179results about How to "Protect against damage" patented technology

The invention provides a microwave anechoic chamber performance measuring method, which comprises the following steps of: adopting a microwave anechoic chamber performance measuring system, and setting a dead zone parameter, a measuring frequency, a signal source power, a scanning trace and a kinematic velocity of a receiving antenna, and a rotation direction and a rotation velocity of a transceiving antenna according to the requirements of a microwave anechoic chamber performance analysis test; driving a signal source according to the signal source power; driving each stepping motor to control each moving part to move according to the scanning trace and the kinematic velocity of the receiving antenna, and the rotation direction and the rotation velocity of the transceiving antenna; and controlling a signal receiver to receive a signal of the receiving antenna according to the measuring frequency, and storing the signal. The method can be adopted to be applied in a microwave anechoic chamber flexibly so as to measure along different scanning traces; and a computer is adopted to realize automatic measurement of microwave anechoic chamber dead zone reflectivity level, cross polarization character, multi-path loss uniformity, and field uniformity performance indexes, so that the measuring efficiency is improved.

The invention provides an anechoic chamber performance measurement system which comprises testing racks and control devices. The testing racks comprise a transmitting antenna rack used for lifting and rotating a transmitting antenna, a receiving antenna rack used for moving and rotating the receiving antenna in a three-dimensional space. The control devices comprise a processor, a laser distance measuring sensor, a steeping motor which controls movement of all parts in the testing racks, a signal source and a signal reception device. The anechoic chamber performance measurement system can be applied to measurement of the anechoic chamber along different scanning traces. Automatic measurement of anechoic chamber dead zone reflectivity level, cross polarization character, multipath loss uniformity and field uniformity performance index are achieved by using automatic control, automatic measurement and automatic storage measuring data of a computer. Measurement efficiency is improved, and measurement accuracy is high.

The invention provides an application method of an all-transparent vacuum glove box. The vacuum glove box is produced by high-transparency organic glass or an acrylic material, and comprises an operation box body, a circular door, an inner transition bin door, an outer transition bin door, a glove port, a vacuum air valve and a vacuum pressure gauge, wherein a larger apparatus or material is fed from the circular door at one end of the operation box body; a small sample or apparatus is fed in a transition bin from the outer transition bin door at the other end of the operation box body; a vacuum system is accessed into the vacuum valve; the operation box, the transition bin and the glove port are synchronously vacuumized; the vacuum valve is closed after the vacuumizing is finished; then, an inert gas system is accessed into the vacuum valve; high-purity inert gas is synchronously charged in the operation box and the transition bin until the indicating numerical value of the vacuum pressure gauge reaches 0, and the vacuum valve is closed; the operation is repeated for 2-3 times, the atmosphere in the box body can reach high-purity inert gas atmosphere-anaerobic oxygen water environment, and the corresponding operation can be performed for an object; after the operation and the application are finished, a sample is taken out from the glove box through the transition bin; and as the whole glove box adopts the acrylic material to achieve high transparency, the operation process of no-dead angle sample observation by 360 degrees is realized.

The invention discloses a variable stiffness joint based on a cylindrical cam and a control method thereof. According to the variable stiffness joint, a cylindrical iron core electromagnet is mountedon a cylindrical cam cylinder; an annular armature is mounted on the side of a roller of a roller disc; the electromagnet generates electromagnetic attraction to the annular armature; the roller movesin a curved surface groove formed in the wall of the cylindrical cam cylinder, so that the cylindrical cam cylinder rotates and generates restoring torque; by increasing a current of an electromagnetcoil, an axial force borne by the roller disc is increased, and the joint rigidity is increased; and by reducing the current of the electromagnet coil, the axial force borne by the roller disc is reduced, and the joint rigidity is decreased. The control method of the variable stiffness joint comprises the steps of: inputting target stiffness by means of a computer; regarding a calculated actual rigidity value as a feedback signal; calculating a rigidity control value by adopting a PID control algorithm; then calculating a current value needing to be applied under the required rigidity by adopting a theoretical torsional rigidity formula; and adjusting the current to enable the joint to reach the required rigidity. Therefore, the joint and the control method achieve adjustment of the torsional rigidity of the rotational joint on the premise that a motor and an elastic element adjusting mechanism are omitted.

The invention provides an on-orbit inflatable inflatable satellite that can be inflated and expanded, comprising: a satellite core, a support body and a satellite shell, the satellite core is arranged at the center of the satellite shell, and the satellite core and the satellite shell are connected with support body. The satellite core contains the electronic components of the satellite, and the support body is composed of an inflatable expanded support tube. The upper surface outside the satellite shell is used to paste flexible solar cells to form a body-mounted solar cell array, and the lower surface outside the satellite shell uses shaping technology to form the shape of the antenna, and install antenna component modules to form a body-mounted antenna . The present invention adopts a substantially spherical inflatable unfolding structure, and there are no flexible structures such as large-scale long-arm solar panels and space-borne antennas after forming, thus greatly improving the overall structural rigidity of the satellite and improving the overall vibration fundamental frequency of the satellite. Compared with existing satellites, the fundamental frequency of vibration is increased by 5 to 10 times. The overall dynamic characteristics of the satellite have been improved, and the overall stability of the satellite has been improved.

The invention belongs to the technical field of wood floors, and in particular relates to an elastic floor and a production method thereof. The elastic floor comprises a floor substrate; and the surface of the floor substrate is coated with a high-elasticity UV paint layer which is formed by using large molecular weight flexible polymers and a large molecular weight active diluent as main film forming materials. The floor substrate is made of pure soft wood with a density between 0.35 and 0.55 or a medium and high density laminated plate with a density of 0.8. The production method for the elastic floor comprises the following steps: a) performing surface finish on the floor substrate; and b) coating the high-elasticity UV paint layer which is formed by using the large molecular weight flexible polymers and the large molecular weight active diluent as the main film forming materials. The elastic floor adopts the high-elasticity UV paint as finishing paint of the floor to prevent children from physical injuries because of falling, and has high elasticity after being coated with elastic pain despite that the substrate is made of the pure soft wood or the medium and high density plate.

A gas insulated metal enclosed switchgear is equipped with a bus-bar chamber, a circuit breaker chamber and a cable chamber, the bus-bar chamber is equipped with a pressure releasing window (A), and the circuit breaker chamber is equipped with a pressure releasing window (B). The pressure releasing windows (A and B) are both communicated with an upward pressure releasing channel, the pressure releasing channel is communicated with the atmosphere via a top cover pressure releasing hole, and a bus-bar chamber pressure releasing port is branched out of the top cover pressure releasing hole. A horn-like pressure releasing channel is arranged outside the bus-bar chamber pressure releasing window, and a first bending force reduction unidirectional opening enclosing device is arranged outside the circuit breaker chamber pressure releasing window. The cable chamber is equipped with a pressure releasing port, and the pressure releasing port passes a second bending force reduction unidirectional opening enclosing device and then is communicated with the pressure releasing channel. The structure of the enclosing devices is that a box or plate covers the pressure releasing window or the pressure releasing port, one edge of the box or plate is fixed, and a plurality of bending force reduction square hole grids which are parallel with the fixed edge are arranged on the plate surface inside the fixed edge. According to the gas insulated metal enclosed switchgear of the present invention, when an internal arc occurs, the mutually independent compartments of the switchgear and the adjacent switchgears operate independently and do not influence mutually, and the equipment are safe and reliable.

The invention discloses a flexible ship body attachment cleaning device. An output shaft of a motor is coaxially and fixedly connected with the top end of a spline shaft through a coupler; the bottom end of the spline shaft is fixedly connected to a central column in the center of a rotary sweeping disc module; a plurality of radial blade spokes are uniformly distributed between the inner wall of a rotary disc body and the central column of the rotary disc in the peripheral direction; two to four combined rotors are connected to the positions under each blade spoke in a rotatable manner; a plurality of combined cutters are fixedly connected to the positions under the disc plane of the rotary disc body, and are uniformly distributed on an inner ring and an outer ring of the disc plane of the rotary disc body in the peripheral direction; five to eight combined cutters are uniformly distributed on the inner ring and the outer ring of the disc plane in the peripheral direction of the disc plane; a brush disc is mounted under the disc plane of the rotary disc body; relative to the surface of a ship body, the bottom surface of the brush disc is lower than those of the combined cutters, and the bottom surfaces of the combined cuttes are lower than those of the combined rotors. Through the adoption of the cleaning device disclosed by the invention, the cleaning effect is guaranteed, and a paint layer and a steel plate layer of the ship body are effectively prevented from being damaged.

The invention discloses an electric torque synchronous bolt tightener, which comprises a main cylindrical shell, a main groove structure is arranged inside one end surface of the main cylindrical shell, and the other end surface of the main cylindrical shell passes through a bolt A force control mechanism housing is fixed, and a force control mechanism is installed inside the force control mechanism shell, and an end surface of the force control mechanism shell is fixed with a motor fixing shell by bolts, and the inside of the motor fixing shell is An electric motor is installed, and the main shaft of the electric motor in the electric motor passes through the fixed casing of the electric motor and the casing of the strength control mechanism. The present invention utilizes the electric motor to carry out synchronous rotating and fastening effect on multiple bolts, so that multiple bolts can go deep into the fastening part under the action of the thread structure at the same time, thereby reducing the damage to the thread structure and improving the service life of the wheel. In addition, the device has a force control mechanism, which can further protect the thread structure from damage.

A probiotics microcapsule for feeding is characterized in that the probiotics in the probiotics microcapsule is composed of bifidobacterium animalis, enterococcus faecium, and lactobacillus casei. Theprobiotics microcapsule also comprises a protective agent, which comprises glycerin, skim milk powder, ascorbic acid, lycium barbarum polysaccharide, xylooligosaccharide, tryptophan, and sterile water. According to the preparation method, lycium barbarum polysaccharide, tryptophan, and xylooligosaccharide are combined, then the composition is combined with common protective agent components, through the cooperation among the components, the high activity of live bacteria in the probiotics microcapsule can be maintained, the live bacteria will not be destroyed or damaged by chemical componentsand low temperature during the processing process, and at the same time, after preservation, the live bacteria still have high proliferation activity.

The invention solar energy controlled buoyancy automatically keep-balance helium-gas airship, which has a buoyancy device using air balloon lighter than air to generate buoyancy; a propulsion device, a manned or manned / luggage device, and a buoyancy control device. The invention at least has two groups of buoyancy gas containers-soft balloon or balloon-rigid balloon, while different balloon groups are connected by tubes; the tubes have been connected with pressure pump in series comprising inflator and charge / release valve; the invention uses the inflating balloon to generate buoyancy, while the buoyancy gas has different pressure and density distribution in different balloon groups via the function of inflating pump to realize the automatic control on the buoyancy; the buoyancy regulation is realized by adjusting the density and pressure distribution between each group of balloon via the electric control system; the invention has a adjust-flying airflow pump to realize automatic balance, while its outlets are distributed all around the aerobat via the outlet channels and branches. The invention has lower cost, environmental-friendly energy and better safety.

The invention discloses a vacuum pumping tire segmental mold. The segmental mold comprises a base and a guide ring; a seal device is arranged between the lower end face of the guide ring and the upper end face of the base; the mold has the beneficial effects that exhaust is smooth, the dead corners of the mold are easily filled with tire compounds, the tire appearance is attractive, and the tire performance is good; the position between the guide ring and a mounting ring is subject to end face fixed seal, the seal effect is better, the service life of a seal ring is prolonged, and the material cost is reduced; the mold can be used by mounting rings in different shapes and with different types, and the adaptation is wide; meanwhile, components of the segmental mold are convenient to machine, the difficulty is low, the phenomenon that due to grooving in the guide ring, the strength is reduced is avoided, in addition, the phenomenon that a seal ring is placed on the lower end face of the guide ring, when the guide ring is placed and transported, the seal ring needs to be protected against damage caused by extrusion or collision is avoided, cost for machining and designing a new mold again is saved, a vacuum pumping mold of a new structure does not need to be designed again, the mold can be sealed, and the design and machining cost of the vacuum pumping mold is greatly reduced.

The invention discloses a multi-information fusion human exoskeleton robot control protection system. The system comprises a plurality of inertia measurement assemblies, a plurality of electromyogramsensors, respiration sensors, a depth camera and machine learning processing computers, wherein the inertia measurement assemblies and the electromyogram sensors are installed at arms and legs of a human body, the respiration sensors are installed on a chest, the depth camera is worn on a head, and the machine learning processing computers are installed at any position of the human body; effectivedata acquired by all the sensors at a certain moment are used as input of an LSTM neural network based on a BPTT algorithm, the sum of time consumed by processing a machine learning algorithm throughthe computers and the maximum delay time of receiving control signals by a steering engine at each position of the robot from the moment is used as a time interval, a control signal representing a movement intention of the human body at the moment after the time interval is used as output, a nonlinear function mapping relation which is difficult to express through an analytic expression in engineering is established through neural network training, the movement intention of the human body at the next moment is judged through the action at the moment, so that a function that the correspondingcontrol signal is output is achieved.

The invention discloses a precise near-net forming technology and device for a bevel gear shaft. The technology comprises the following steps of (a) precise saw cutting of a bar; (b) annealing treatment; (c) blank lubrication by adopting a high polymer lubricant; (d) conical blank preforming through cold heading: preliminarily preforming the blank according to a bevel angle of the bevel gear shaft and the shape of a shaft step and laying a foundation for next near-net forming of a bevel gear and a step shaft; (e) molybdenum disulfide lubrication: mixing molybdenum disulfide powder and engine oil at a ratio of (30-40wt%):(60-70wt%), coating the surface of the preformed blank with the prepared molybdenum disulfide and directly putting the preformed blank into a near-net forming die for molding; (f) precise near-net forming: forming the bevel gear shaft on a precise near-net forming device; (g) machining according to the requirements; and (h) forming of a product. The forming device comprises four parts, such as a set of combined bevel gear die, a set of combined step shaft die, a reinforcing plate and an ejector stopper.

The invention discloses a novel column end node of a building structure, namely a column is connected with a floor slab by arranging two steel plates. The contact area of the two steel plates is smaller than the section area of a column end; the configured quantity of vertical steel bars of the column between the two steel plates is relatively less than that of the column end; the rigidity of the node and the bending resistance are lower than that of other parts of the column end; a control node area is an energy consumption area of the column, the column end is avoided from generating damage under the action of horizontal loading of earthquake or wind and the like and the safety of the whole column is protected, thus achieving the effect of strong column and weak beam of code requirements, improving the damage resistance of the building under the action of loading of earthquake and wind, and effectively protecting the safety of lives and property of people.

The invention relates to the technical field of radiation protection, and particularly relates to a radiation protection composite material as well as a preparation method and application thereof. Theradiation protection composite material is prepared from, by weight, radiation shielding filler slurry and liquid rubber, wherein the radiation shielding filler slurry is prepared from the followingcomponents in parts by weight: 100-150 parts of bismuth trioxide, 1-10 parts of filler and 1-10 parts of polyacrylate. The radiation protection composite material provided by the invention is lead-free and non-toxic and has excellent flexibility and ductility, the high-concentration radiation shielding filler is uniformly dispersed in the liquid rubber and has efficient anti-radiation performance,and the prepared radiation protection gloves meet ASTMD3578-01 edition of Latex Inspection Glove Standard Specification, the requirements of YY / T0481-2016 Medical Industry Standard of People's Republic, and the GBZ 130-2020 edition of Standard for Occupational Health of the People's Republic of China, injuries caused by X-rays can be effectively prevented, fine surgical operations in clinical interventional surgeries can be met, and harm to hands of operators can be reduced.

The invention relates to the technical field of interference protection and discloses a high-power capacity and high-power microwave protection device. The device comprises an input interface, an output interface, a multi-stage steady-state filter circuit and a three-stage transient bleeder circuit, wherein the multi-stage steady-state filter circuit is composed of a plurality of steady-state filter circuits connected in series, two ends of the multi-stage steady-state filter circuit are connected with the input interface and the output interface through microstrip lines respectively, and thethree-stage transient bleeder circuit is connected in parallel with the steady-state filter circuit through an impedance matching line. The device is large in rated power capacity, small in insertionloss, high in response speed, high in universality, convenient to install and maintain, capable of effectively preventing high-power microwaves from damaging electronic equipment, and capable of beingapplied to high-power microwave protection of short-wave, ultra-short-wave and other receiving and transmitting integrated communication systems.

The invention discloses an intelligent bus eddy current displacement sensor with an integrated structure. The intelligent bus eddy current displacement sensor with integrated structure is characterized in that an intelligent bus module and a signal conditioning circuit board are arranged in a housing; two sides of the housing are each provided with an electric connector which is in network connection with a bus; a conductive rubber electromagnetic shielding cover with a built-in sensor probe is arranged between the housing and a detection board; the sensor probe is connected with the signal conditioning circuit board; a power supply module installed on the intelligent bus module in an integrated way is in tapping connection with the signal conditioning circuit board, an A / D conversion chip, the sensor probe, a temperature sensor, a DSP operation module and a CAN bus transceiver; the signal conditioning circuit board is connected with the sensor probe and the A / D conversion chip; the CAN bus transceiver is connected with the DSP operation module and the electric connectors; and the DSP operation module is connected with the temperature sensor. The intelligent bus eddy current displacement sensor with an integrated structure has functions of on-line temperature drift compensation, non-linear error correction, electromagnetic shielding protection, outputting of digital signals, fault self diagnosis and the like, and has the advantages of being high in the integration degree, the measuring accuracy, the intelligent degree, the anti-interference capability and the adaptability.

The invention provides an arch auto-distress shockproof bed, belongs to the technical field of a shockproof device, and solves the technical problem that no auto-distress device is available in the prior art. The shockproof bed comprises a bed frame capable of being arranged on a floor; an extensible locating mechanism for locating a bed plate and the bed frame along the vertical direction is arranged between the edge of the bed plate and the bed frame; an arch protective cover is also arranged inside a hollow cavity at the middle part of the bed frame; a guide structure is arranged between the bed frame and the protective cover; a sliding block connection link mechanism is also arranged on the bed frame; the protective cover can move to the upper part of the bed plate through the sliding block connection link mechanism; and a power mechanism for providing power to the sliding block connection link mechanism is also arranged on the bed frame. The arch protective cover is covered above the bed plate, so that the personnel are protected by the protective cover. The arch protective cover has strong resistance on the impact from each direction due to a good stress structure. Therefore, the shockproof effect is improved.

The invention discloses an intervertebral disc prosthesis shock absorption structure, which comprises an upper terminal plate, a lower terminal plate and a ball pad, wherein the ball pad consists of a ball body and a connecting post, the ball surface is movably arranged in a ball-shaped groove of the lower terminal plate, the connecting post is movably clamped and buckled in a groove of the upper terminal plate, in addition, a first moving gap is formed in the groove of the upper terminal plate, a second moving gap is formed between the upper terminal plate and the end, far away from the ball surface, of the ball body, and an elastic structure is arranged between the ball pad and the upper terminal plate. The intervertebral disc prosthesis shock absorption structure has the advantages that the intervertebral disc prosthesis has the obvious shock absorption effect, the impact load generated when the human body moves is relieved, and the human body is protected from the injury due to insufficient human body buffer.

The invention relates to the field of metal processing, and discloses a multifunctional circular pipe metal cutting machine which comprises a base. A first rotating rod is rotatably connected to the interior of the base, a first gear is fixedly connected to the surface of the first rotating rod, and a second rotating rod is fixedly connected to the top end of the first rotating rod; and a foundation support is fixedly connected to the upper surface of the first rotating rod, a first stand column is fixedly connected to the top end of the base, a sliding strip is slidably connected into the first stand column, and a fixing block is fixedly connected to the side, close to the sliding strip, of the first stand column. By arranging a telescopic rod, a clamping plate, a rotating wheel, a connecting rod, the rotating rod and the sliding strip, a double clamping device is formed, metal pipes with different diameters can be clamped, the stable clamping effect can be well achieved, the situation that the metal pipes incline during cutting is avoided, the sections of the cut metal pipes are more perfect, and the practicability of the machine is enhanced.

The invention discloses an itching relieving composition. The itching relieving composition comprises cardiospermum halicacabum extract, herba portulacae extract, lavender essential oil, camphor and borneolum syntheticum. The itching relieving composition has the advantages that the four effective components, namely cardiospermum halicacabum extract, herba portulacae extract, camphor and lavender essential oil, are matched with one another according to specific proportions; accordingly, the itching relieving composition, containing abundant diversified functional components which are blended with one another and cooperate with one another, has antibacterial and anti-inflammation effects and an excellent itching relieving function. The itching relieving composition can be applied to emulsion for treating insect bite, integral formula emulsification systems are excellent, the itching relieving composition is good in compatibility and rheological property and easy to prepare, can be absorbed by skins easily and is practical, applicable and economical, and the like.

The invention provides an in vitro temporary cardiac pacemaker with a measurement function. The in vitro temporary cardiac pacemaker includes a power supply, a power management system, a pacing measurement system, an input unit, a display unit and an electrode terminal, wherein the power supply is electrically connected with the power management system which is connected with the pacing measurement system; and the pacing measurement system includes a microcontroller, a pacing circuit, a sensing and measurement circuit, a defibrillation protection and EMI filter and a clock oscillation circuit.The microcontroller is connected with the pacing circuit, the sensing and measurement circuit and the clock oscillation circuit. The pacing circuit and the sensing and measurement circuit are connected with the defibrillation protection and EMI filter. The defibrillation protection and EMI filter interacts with the electrode terminal. The input unit is provided with an input interface, and the input interface is electrically connected with the power management system and the microcontroller. The display unit is electrically connected with the microcontroller. The in vitro temporary cardiac pacemaker with the measurement function can measure and display parameters such as a pacing threshold, myocardial impedance and P / R amplitude, to facilitate implantation of a pacing electrode and electrode fault monitoring.

The invention relates to a toad breeding device and a toad venom acquisition method. The toad breeding device is characterized by comprising a wooden box. A transverse aluminum plate is disposed in the wooden box, a longitudinal filter net perpendicular to the aluminum plate is disposed on one side of the aluminum plate, the box is divided into a breeding area and an acquisition area by the longitudinal filter net, and the aluminum plate is disposed in the breeding area. A transverse filter net is disposed in the middle of the acquisition area and divides the acquisition area into a temporary storage area and a collection area, and a collection container is arranged in the collection area. The toad breeding device is applicable to breeding of toads and acquisition of toad venom, is clean for toad breeding so that the toads are less prone to bacterial infection, and breeding cost is further reduced. Secondary pollution of venom fluid is avoided for the acquisition of the toad venom, the maximum yield can be achieved, and quality of the toad venom can also be improved. In addition, parotid glands of the toads are well protected from damage, and the venom fluid is prevented from jetting into eyes of an acquirer to cause damage.

The invention relates to a natural radiation-resistant biological extract composite which is composed of four natural biological extracts in percentage by weight: 60-95 wt% of tea polyphenol, 1-20 wt% of ganoderma lucidum polysaccharide, 2-20 wt% of spirulina polysaccharide and 2-20 wt% of ginkgo flavone. The composite components have the pure natural biological extracts with the same or similar functional group, and can produce the composite synergistic effect action so as to effectively adjust damaged cell apoptosis and inhibit damaged cell proliferation, thus obviously lowering electromagnetic radiation damage. The extract composite can participate in organism biochemistry metabolism, reduces omnipresent electromagnetic radiation damage in daily life, accelerates the reparative process of electromagnetic radiation damage and has the characteristics of safety and no toxicity or side effect. The invention has the advantages of convenient raw material obtaining, mature, simple and easy technology, convenient popularization and utilization and the like.

The invention discloses a gastroscope medicine applying device for a digestive system department. The gastroscope medicine applying device comprises a support rod, wherein the support rod is in a hollow structure; a partition plate is arranged in a hollow cavity; the support rod is divided into two parts, namely a handle lever and a medicine applying rod through the partition plate; a slide chute is formed in the surface of the tail end of the handle lever; a matched slide block is arranged on the slide chute in a sliding manner; one side of the slide block is located in the inner cavity of the handle lever; one end of the slide block in the inner cavity of the handle lever is connected with a steel connecting line; and the inner cavity of the medicine applying rod is divided into a lubricating cavity, a liquid medicine injection cavity and a mounting plate from left to right. According to the gastroscope medicine applying device for the digestive system department, through a lubricating agent in the lubricating cavity at the front end, when the slide block slides, the slide plate can slide in the inner cavity of the mounting plate through the steel connecting line and a reset spring; and a powder medicine can drop out from a powder medicine outlet, so that damages to a gastropore when the medicine is applied are well avoided.

The invention discloses an abrasive band, which comprises a base body, a bonding layer and an abrasive material layer, wherein the abrasive material layer consists of a bottom material and an abrasive material arranged on the bottom material; the base body is fixed with the bottom material of the abrasive material layer through the bonding layer; the width of one end, supporting the bonding layer, of the base body is smaller than the width of the other end of the base body; the two side surfaces of the base body are inclined surfaces or arc-shaped surfaces; the bonding layer covers the base body; after the abrasive material layer covers the bonding layer, the two side surfaces of the bonding layer and the abrasive material layer are identical to the side surface of the base body; grooves are formed in the base body; the abrasive band also comprises a reticular reinforcing layer; the reticular reinforcing layer is embedded into the grooves formed in the base body; after the reticular reinforcing layer is fixed on the base body, the reticular reinforcing layer is positioned between the base body and the bonding layer. The abrasive band has the characteristics that workpieces cannot be easily damaged; the self service life is long.

The invention provides a multifunctional soil treatment and remediation facility. The multifunctional soil treatment and remediation facility comprises a handle, a rotating rod, a trolley frame, a water spraying switch, a selective switch, a graduated scale, a perforating machine, a flatness measuring rod structure, a mud scraping plate structure, an anti-skid wheel, a wheel axle, a soil remediation pump, a soil remediation wheel structure, a wheel base, a driving belt pulley, a driving motor and a V belt. The handle is connected to the upper right end of the rotating rod in a threaded mode, and the left lower end of the rotating rod is connected to the right side of the interior of the trolley frame in a coupling mode. The right side of the water spraying switch and the right side of theselective switch are embedded into the upper right portion of the obverse surface of the rotating rod from top to bottom. According to the multifunctional soil treatment and remediation facility, theincluded angle between every two adjacent soil remediation poking rods is set to range from thirty-five degrees to forty-five degrees, each soil remediation poking rod specifically adopts a stainlesssteel rod with a folded head at one end and external threads at the other end, and the length of each soil remediation poking rod is set to range from ten centimeters to fifteen centimeters; and a plurality of soil remediation poking rods are arranged, hard soil lumps in the soil can be rapidly remediated and flattened, and the remediation effect is guaranteed.

The invention discloses an electronic device which comprises a housing. The housing comprises a metal body and a rubber body, wherein the metal body forms the shape of the housing and has pre-designed hardness, and the rubber body attaches to the outer surface of the metal body at least partially, serves as the bump buffering part of the electronic device and is used for protecting the electronic device. In the electronic device, the housing is provided with the metal body capable of forming the shape of the housing, and a basic function of forming the space accommodating electronic components of the electronic device is achieved. The electronic device is further provided with the rubber body attaching to the outer surface of the metal body at least partially, can serve as the bump buffering part of the electronic device, plays the protecting effect on the electronic device and facilitates electronic device prevention against damage caused by bump.