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47results about How to "With vibration function" patented technology

Rotary ball massage rod with vibration function at head

The invention discloses a rotary ball massage rod with a vibration function at the head. The rotary ball massage rod comprises a main control switch, a shell, a power device, a rotating device, and a vibrating head arranged in colloid on the top of a massaging head, wherein the main control switch, the power device, the rotating device and the vibrating head are sequentially arranged in the shell; the vibrating head comprises a housing, a vibrating motor and a spherical joint head; both the vibrating motor and the spherical joint head are arranged in the housing; and the spherical joint head is connected with a rotating shaft of the rotating device through a movement rod, and the vibrating motor is connected with the main control switch through a wire. According to the invention, the technical problem that how can the head of the traditional rotary ball massage rod have the vibrating function so as to have a better use effect can be solved.
Owner:AILV HEALTH TECH

Single-optical-fiber scanning device

The invention relates to a single-optical-fiber scanning device, which consists of an optical conduction fiber core 1, an external metal coating layer 2, a piezoelectric thin layer 3 and a metal electrode layer 4, wherein the device integrates a piezoelectric vibration control system based on the piezoelectric thin layer 3 onto the optical conduction fiber core 1; by loading required electric signals to the external metal coating layer 2 and the metal electrode layer 4, the periodic deformation of the piezoelectric thin layer 3 can be caused, so that the optical fiber vibration can be realized. Through the integration, the single-optical-fiber scanning function can be realized; the dimension of a core element of the vibration scanning system can be effectively reduced; the application to afine micro nanometer scanning system can be facilitated.
Owner:CHINA JILIANG UNIV

Double-end rod massaging device

PendingCN108743300AWith vibration functionWith sucking and licking functionVibration massageGenitals massageEngineeringButt joint
The invention discloses a double-end rod massaging device. The device comprises a shell, a circuit board, a battery and an operation button. A seal cover is arranged at the front end of the shell andconnected with an air sucking device through an air pipe; a soft tongue part in a tongue shape is arranged at the front end of the shell and extends into the seal cover, and a triggering mechanism isarranged inside the soft tongue part and comprises a triggering part, an eccentric part and a rotating motor; the rotating motor is connected with the circuit board, the eccentric part is connected with the rotating motor, the triggering part is in butt joint with the eccentric part to form a swinging driving structure for the soft tongue part, and the triggering part is located inside the soft tongue part. By arranging the seal cover, the air sucking mechanism, the tongue part, the triggering mechanism, a vibrating mechanism and others, the massaging device has the functions of vibration, sucking and licking, can accordingly bring strong comfortable and cool feeling to a user, and improves the using interest of the user; by using an appropriate seal cover for replacement, the double-end rod massaging device can be suitable for women and men.
Owner:东莞市贵公成人用品有限公司

Structure of messaging device

InactiveCN1679462AAdjust the movement angleIncrease irritationGenitals massageReciprocating motionMassage
A structure of massage appliance with multiple message actions is composed of a base, a connector, a main body and the exchangeable message part. Said main body has a drive chain set which is driven by a motor to in turn drive a slide plate, the first rod and the second rod extended out of the main body for installing the massage part to it.
Owner:ACXING INDAL CO LTD

Three-proofing complete equipment for drilling and punching

The invention discloses three-proofing complete equipment for drilling and punching. The three-proofing complete equipment is characterized by comprising an orifice sealing device, a coal-water collecting box, a coal-water separation vehicle and a centrifugal separator, wherein the orifice sealing device is used as an inlet end for collecting coal-water slag and gas in a drill hole to seal the periphery of the drill hole, and the orifice sealing device is of a cylindrical barrel structure; the coal-water collecting box comprises an upper box body and a lower box body; one side of the upper box body is hinged to one side of the lower box body; the upper box body and the lower box body are rotationally closed to form a box body which is buckled up and down, and a sealing opening which is in butt joint with the orifice sealing device is formed in the side wall of the box body; the coal-water separation vehicle comprises a gas-liquid separation device, a lifting device and a drainage tank, and a liquid inlet of the gas-liquid separation device communicates with a lower connector of the coal-water collection tank; and the centrifugal separator comprises a horizontal spiral centrifugal machine and is used for carrying out secondary separation on the separated sewage of the drainage tank. According to the equipment, orifices can be effectively protected in the coal mine underground drilling and punching process, meanwhile, coal-water slag generated in the construction process can be subjected to multi-stage filtration, and filtered sewage is recycled.
Owner:HENAN TIEFULAI EQUIP MFG CO LTD

Pneumatic anchor rod drilling machine

The invention provides a pneumatic anchor rod drilling machine, which comprises a main shaft component, a pneumatic motor and a vibratory percussion component, wherein a main shaft is arranged in the main shaft component; the pneumatic motor is linked with the main shaft component through a gear train; the vibratory percussion component is connected with the main shaft component, and is used for transmitting vibration for the main shaft. According to the pneumatic anchor rod drilling machine, rotating movement, percussion movement and vibratory rotating movement can be realized, so that the pneumatic anchor rod drilling machine is endowed with a rotating drilling function, a percussive rock drilling function and a vibratory cutting function, different functions can be selected for construction during coal mine production according to different geological conditions, the drilling speed of a coal mine can be effectively increased, and the productivity of the coal mine can further be improved.
Owner:JIKAI HEBEI MECHATRONICS TECH CO LTD

Plastic mold with vibration function

ActiveCN107364093AWith vibration functionVibration Function GuaranteeEngineeringMechanical engineering
The invention relates to a plastic mold, in particular to a plastic mold with a vibration function. According to the plastic mold with the vibration function, the result that raw materials are not cut off can be ensured, so that female molds are filled with molten plastic; the labor efficiency and the production efficiency are improved; and meanwhile, the yield also can be predicted and ensured. The plastic mold with the vibration function comprises a bottom plate and the like. A closing mechanism is connected to the top of the left side of the bottom plate. Mold cavities are connected to the right end of the closing mechanism up and down. A lifting mechanism is connected to the right side of the top of the bottom plate. The bottom of the lifting mechanism makes contact with the tops of the upper-side mold cavities. By means of the plastic mold with the vibration function, the effects that the result that the raw materials are not cut off can be ensured, so that the female molds are filled with the molten plastic; the labor efficiency and the production efficiency are improved; and meanwhile, the yield also can be predicted and ensured are achieved.
Owner:กวางตุ้ง คิวแมน คัลเจอร์ คอมมูนิเคชั่น โค แอลทีดี

Precise drilling machining device with vibrating function

The invention discloses a precise drilling machining device with the vibrating function. The drilling machining device comprises a spindle box, wherein a fixing support is fixedly connected to the inner bottom wall of the spindle box, one side, far away from the bottom wall of the spindle box, of the fixing support is fixedly connected with a first driving motor, the output end of the first driving motor is fixedly connected with a first rotating shaft, and one end, far away from the first driving motor, of the first rotating shaft is fixedly connected with an eccentric wheel; two symmetric tracks are fixedly connected to the inner side surface of the spindle box, and a power box is clamped between the interiors of the tracks; two guide rods are fixedly connected to the inner top wall of the spindle box; and a groove matched with the eccentric wheel is formed in the upper surface of the power box, a second spring is fixedly connected to the inner bottom wall of the groove, and a supporting plate is fixedly connected to one end, away from the inner bottom wall of the groove, of the second spring. The precise drilling machining device with the vibration function has the advantages that the vibration function is achieved, impurities can be removed conveniently, and a user can conveniently use the device.
Owner:周玉翔

Continuous sand blasting tool

The invention relates to a continuous sand blasting tool which includes an internal oil pipe and an external oil pipe. The continuous sand blasting tool is characterized in that the upper end of the internal oil pipe is provided with a compensation type sand blasting sealing tool, the lower end of the external oil pipe is provided with a buffer sand blasting suspension tool, and the lower end of the internal oil pipe is provided with a sitting type strong jet flow sand blasting tool; the compensation type sand blasting sealing tool includes an upper joint I, a central tube, a piston and a sealing sleeve, a packing cup is arranged between the upper joint I and the sealing sleeve, and a piston slides freely on the central tube; the buffer sand blasting suspension tool includes an upper jointII and a lower joint, the upper joint II and the lower joint are connected by threads, and a spring component is arranged in an inner cavity formed by the upper joint II and the lower joint and in front of a plug; and the sitting type strong jet flow sand blasting tool includes an outer tube, a sealing sleeve and a pen tip, the lower end of the pen tip is sequentially in threaded connection to aconstant pressure ball seat, an inner spring seat I, an inner spring seat II and a sand blasting opening. The device can avoid sand blocking and pump blocking, speeds up the process of sand blasting,reduces use of sand blasting liquid and improves the sand blasting efficiency.
Owner:LIAONING XINHUA INSTR CO LTD

Multifunctional sample adding device for inspection equipment

The invention relates to a multifunctional sample adding device for inspection equipment. The device comprises a mechanical arm, the mechanical arm is flexibly connected with a connecting rod piece, the two ends of the connecting rod piece are fixedly connected with a vibration source and a sample adding needle respectively, the vibration source drives the sample adding needle to vibrate, the connecting rod piece is provided with a sample adding channel, the sample adding channel is communicated with a sample adding needle and a sample adding pipe, and the sample adding pipe is a hose. The device further comprises a sleeve, the connecting rod piece is sleeved with the sleeve, the sleeve is connected with the mechanical arm, and the connecting rod piece is flexibly connected with the sleeve. According to the multifunctional sample adding device for inspection equipment, provided by the technical scheme, on the basis of an existing sample adding device, the vibration source is additionally arranged, the vibration source works to drive the sample adding needle to vibrate, and therefore the sample adding needle has the vibration function.
Owner:长沙海柯生物科技有限公司

Garlic and peanut harvester

The invention relates to the technical field of agricultural machinery, in particular to a garlic and peanut harvester which comprises a frame, a crawler walking device, an excavating device, a first-stage conveying device, a second-stage conveying device, a flow guiding device and a control platform. The control platform is arranged at the top of the frame, and a plurality of control levers, an oil supply device, an engine and a reduction gearbox are arranged on the control platform. The garlic and peanut harvester is multipurpose and can be used for harvesting peanuts after garlic is harvested, the utilization rate of the harvester is increased, the crawler walking device can meet the requirement that the whole harvester walks and steers in a garlic or peanut field, and the excavating device can effectively dig out garlic or peanuts from the land in a quality-guaranteed manner; and the garlic or the peanuts can be conveyed to the flow guiding device through the first-stage conveyingdevice and the second-stage conveying device, the first-stage conveying device and the second-stage conveying device further have the vibration function, soil carried by the garlic or the peanuts is vibrated and shaken off, the garlic or the peanuts can fall together in a centralized manner through the flow guiding device, and follow-up treatment by farmers is facilitated.
Owner:徐州盛耘农业发展有限公司

Indoor cleaning brush with vibrating function

The invention relates to the technical field of living articles, and particularly discloses an indoor cleaning brush with a vibrating function. The indoor cleaning brush comprises a brush body and a rod body, the lower end of the brush body is provided with a connecting part, a vibrating mechanism is arranged at the upper end of the rod body and comprises a shell and a vibrating box arranged in the shell, a buffering ring is arranged at the upper end of the vibrating box and communicated with a limiting hole in the vibrating box, a vibrating motor is arranged in the vibrating box, a vibratingrod is perpendicularly connected with the output end of the vibrating motor, and the upper end of the vibrating rod sequentially penetrates through the limiting hole and the buffering ring and is connected with the lower end of the connecting part. The vibrating motor drives the brush body to vibrate vertically, so that the brush body has the vibration function during cleaning, the effect of cleaning is improved effectively, and physical output of a user is also reduced. The problem is solved that in the market, most cleaning brushes are moved horizontally and manually through reciprocating toconduct cleaning, as a result, the effect of cleaning is common, and physical output is increased.
Owner:陆靖熹

Automatic wet type screening machine

The invention discloses an automatic wet type screening machine, and relates to the technical field of ore fine sieving. The automatic wet type screening machine comprises a screening machine body anda transmission part. The transmission part comprises a motor. The output end of the motor is in transmission connection with an eccentric shaft through a belt wheel. The surface of the eccentric shaft is sleeved with a bearing. According to the automatic wet type screening machine, through the structure design that the motor drives an eccentric shaft rocker, a sieve has a basic vibration function, through the structure construction of a screen underflow ore receiving groove, basic conditions of proceeding of wet type screening in water are met, the usage functions of the screening machine areenriched through frequency modulation and timing design, and different screening requirements are met. Since application of an automatic screening machine sample machine, the screening effect is good, no difference basically exists between automatic screening and manual screening, under the situation that screen underflow does not need to be recycled, two same-grain-size ore samples can be simultaneously screened every time, the laboratory sample screening efficiency is effectively improved, the work intensity of experiment personnel is reduced, and good practical value is achieved.
Owner:安徽马钢矿业资源集团姑山矿业有限公司 +1

Efficient ventilation structure for steel structure workshop

The invention discloses an efficient ventilation structure for a steel structure workshop, and relates to the technical field of steel structure workshops. The efficient ventilation structure comprises a first ventilation pipe, wherein a rectangular frame is fixedly installed between the inner walls of the first ventilation pipe through a locking mechanism, a filtering mechanism is fixedly installed on the lower surface of the rectangular frame through a buffer piece, a draught fan is fixedly installed on the upper surface of a rectangular box, a dehumidification mechanism is arranged at the position, close to the upper side, in the first ventilation pipe, a second rectangular opening is formed in the right side face of the first ventilation pipe, a second ventilation pipe is fixedly installed on the right side face, corresponding to the second rectangular opening, of the first ventilation pipe, and supporting mechanisms are arranged on the upper side face and the lower side face of the second ventilation pipe correspondingly. According to the ventilation structure, the filtering mechanism has a vibration function and makes dust fall off, the filtering mechanism is not prone to being blocked, the dehumidification mechanism is then used for conveniently dehumidifying entering air and preventing moisture from entering a room, the ventilation structure is conveniently disassembledand assembled through the supporting mechanism, and use is more convenient.
Owner:HUNAN GALAXY STEEL STRUCTURE ENG CO LTD

Volute spiral spring transmission fastening connection mobile phone vibrator with heat radiation function

The invention belongs to the technical field of a mobile phone vibrator, and particularly relates to a volute spiral spring transmission fastening connection mobile phone vibrator with a heat radiation function. The mobile phone vibrator comprises a cover plate, a fixing case, an air inlet hole and the like, wherein the fixing case is provided with an accommodating cavity; a plurality of air inletholes are formed in the inner round surface of one side of the accommodating cavity. The mobile phone vibrator has a vibration function, and also has the function of radiating heat for a mobile phonechip. Through the design of a first blade and a second blade, in the rotation process of an electric motor in the mobile phone vibrator at a low acceleration, the first blade and the second blade arein a 180-degree distribution state at the moment; through the rotating first blade and second blade, hot air in the mobile phone can be diffused, so that the heat radiation effect of the mobile phonechip is better; in the rotation process of the electric motor in the mobile phone vibrator at a high acceleration, the first blade and the second blade cannot be in a 180-degree distribution state atthe moment, so that the mobile phone vibrator has the vibration function.
Owner:万静琼

Electronic equipment and vibration module

The invention discloses electronic equipment and a vibration module. The vibration module comprises a shell, a mass block and a driving part. The shell is provided with a first end and a second end. The mass block is arranged in the shell. The driving part drives the mass block to reciprocate towards the first end or the second end. The first end is provided with a first air outlet, and the second end is provided with a second air outlet. The first air outlet and the second air outlet are one-way valve ports. A first isolation piece is arranged on the side, facing the first end, of the mass block, a second isolation piece is arranged on the side, facing the second end, of the mass block, and the first isolation piece and the second isolation piece can be in sealed butt joint with the inner wall of the shell. The vibration module has a vibration function and a heat dissipation function, and the internal space can be saved for the electronic equipment.
Owner:VIVO MOBILE COMM CO LTD

A high-efficiency ventilation structure for steel structure workshop

The invention discloses a high-efficiency ventilation structure for steel structure factory buildings, and relates to the technical field of steel structure factory buildings. It includes a first ventilation pipe, a rectangular frame is fixedly installed between the inner walls of the first ventilation pipe through a locking mechanism, a filter mechanism is fixedly installed on the lower surface of the rectangular frame through a buffer member, and the upper surface of the rectangular box is fixed A fan is installed, and a dehumidification mechanism is provided near the upper side of the first ventilation pipe, and a second rectangular opening is opened on the right side of the first ventilation pipe, and the right side of the first ventilation pipe corresponding to the second rectangular opening is The second ventilation pipe is fixedly installed on the surface, and the upper and lower sides of the second ventilation pipe are provided with supporting mechanisms. The present invention enables the filter mechanism to have a vibration function, so that the dust falls and the filter mechanism is not easy to be blocked, and then the dehumidification mechanism is used to facilitate the dehumidification of the incoming air to prevent moisture from entering the house, and the support mechanism is used to facilitate the disassembly and assembly of the ventilation structure , more convenient to use.
Owner:HUNAN GALAXY STEEL STRUCTURE ENG CO LTD

Full-automatic valve bag gravity-type charging equipment

The invention discloses full-automatic valve bag gravity-type charging equipment. The full-automatic valve bag gravity-type charging equipment comprises a packaging rack, a packaging frame mechanism,a swinging mechanism, and a discharging pipe, wherein the packaging frame mechanism, the swinging mechanism, and the discharging pipe are all arranged in the packaging rack; the packaging frame mechanism is connected to the swinging mechanism and the discharging pipe; when the packaging frame mechanism is in the bagging or bag-unloading position, the packaging frame mechanism is in a horizontal state; and when the packaging frame mechanism is in the charging position, the packaging frame mechanism is in an inclined state. According to the above method, when the full-automatic valve bag gravity-type charging equipment is in the bagging (bag-unlading) and charging position, the packaging frame mechanism is in two different positions, and the two positions are converted through the swinging of the packaging frame mechanism, and thus, the full-automatic valve bag gravity-type charging equipment is convenient for bagging, sealing and bag unloading; and the full-automatic valve bag gravity-type charging equipment has a vibration function during charging, and improves the working efficiency due to the effect of gravity.
Owner:CHANGSHU SANHE PRECISION MACHINERY & TECH CO LTD

Head-mounted face lift instrument

The invention discloses a head-mounted face lift instrument which comprises an arc-shaped head beam, and the two ends of the arc-shaped head beam are movably connected with a first massage mechanism and a second massage mechanism respectively. The first massage mechanism and the second massage mechanism each comprise a shell, a refrigerating and heating module, a vibration module, an EMS micro-current stimulation module, a power supply circuit and a control circuit, wherein the refrigerating and heating modules, the vibration modules, the EMS micro-current stimulation modules, the power supply circuits and the control circuits are arranged on the side walls of the shells, and heat dissipation holes used for heat dissipation are formed in the outer side walls of the shells. By means of the head-mounted design, the use mode is convenient and fast, during use, the device only needs to be worn on the face, a power source is started, automatic work is achieved, and hand holding, pushing or actions of other people are not needed.
Owner:嘉兴极展科技有限公司

Non-contact remote controller with touch control screen electronic product matching function

The invention relates to the technical field of a remote controller product, in particular to a non-contact remote controller with a touch control screen electronic product matching function. The non-contact remote controller with the touch control screen electronic product matching function comprises a sensor and a controller, wherein the sensor is used for receiving light signals of a light emitting region on an electronic product touch control screen, the controller is used for receiving signals of the sensor and emitting remote control signals to outside, the sensor and the controller are provided with fixing devices capable of being fixed with an electronic product, the sensor and the controller are not provided with interfaces or butt joint devices capable of being electrically connected with the electronic product. The application of using intelligent electronic products with touch control screens, such as iPhone and the like as remote controllers can be realized without improving the traditional remote control product, in addition, any electric connection is not adopted between the remote controller and the electronic product, the product cost is reduced, meanwhile, the performance stability of the intelligent electronic product is ensured, and the problems of interface incompatibility, dysfunction and the like cannot occur.
Owner:赵舜培

Fan with vibration function

The invention discloses a fan with a vibration function. The fan comprises a drive mechanism, a fan component and a vibration mechanism, wherein the drive mechanism comprises a coil and a rotating shaft; the fan component and the vibration mechanism are coaxially assembled on the rotating shaft; the vibration mechanism comprises a ring-shaped rail and two roll balls; when the rotating shaft is driven by the coil to rotate in a positive direction, the two roll balls continuously rotate in the same direction close to and along with the rotating shaft to generate an eccentric torque to form vibration; the fan synchronously rotates along with the rotating shaft; otherwise, when the rotating shaft is driven by the coil to rotate in a negative direction, the roll balls roll along the ring-shaped rail until the two roll balls are separated mutually to form balance rotation, the vibration stops, the fan keeps rotating. With the adoption of the fan with the vibration function, a vibration mechanism is retrofitted on the fan, when the driving mechanism is in the positive direction and in the negative direction according to a mechanical principle, the difference of internal centroid positions is caused, so that the functions of heat dissipation and heat dissipation vibration can be realized controllably; when the drive mechanism is in the positive direction, a heat dissipation and vibration reminding function of the fan are realized; and when the drive mechanism is in the negative direction, and the function of the heat dissipation of the fan is realized.
Owner:共青城赛龙通信技术有限责任公司

Mobile phone vibrator with fastening connection and cooling function

The invention belongs to the mobile phone vibrator technical field, and especially relates to a tightly connected mobile phone vibrator with a heat radiation function; the mobile phone vibrator comprises a cover plate, a fixed housing, and air inlets; the fixed housing has a storage chamber; the plurality of air inlets are arranged on the inner circular surface on one side of the storage chamber;the mobile phone vibrator has a vibration function, and can diffuse heats for the mobile phone chip; a first blade and a second blade are arranged; when a motor in the mobile phone vibrator is in a low speed rotation process, the first and second blades are in a 180-degree distribution mode; the rotating first and second blades can diffuse the heat in the mobile phone, thus enabling the mobile phone chip to have a better heat radiation effect; when the motor in the mobile phone vibrator is in a high speed rotation process, the first and second blades are not in the 180-degree distribution state, thus enabling the mobile phone vibrator to have the vibration function.
Owner:湖南信科诚电子有限公司

Multi-material vibration hopper

The invention relates to a multi-raw material vibrating funnel, which includes a casing, and a central funnel is arranged in the middle of the casing. A side funnel is formed between the shell and the shell. There is a discharge port on the upper part of the shell. The feed plate passes through the discharge port and extends to the outside of the shell. The lower end of the feed plate is provided with a side screen, and the end of the side screen is connected to the discharge Slag plate, the lower end of the side screen is provided with a material conveying channel; the lower end of the shell is equipped with a ring cylinder and a central screen; The mixed material is mixed in the tank, and the mixed material is finally transported away. In addition, the central screen screen has a good screening effect, and the entire equipment occupies a small space, which greatly saves manpower and material resources and reduces costs.
Owner:SHANDONG HUALIAN MINING

Self-inspection type car door lock assembly polishing equipment

The invention discloses self-inspection type car door lock assembly polishing equipment. The self-inspection type car door lock assembly polishing equipment comprises a working table, a rotation mechanism, a rotating shaft, a reduction box, an unqualified product discharging transporting belt, a qualified product discharging transporting belt and a distributor; and the rotation mechanism is arranged on the surface of the working table, the rotating shaft is arranged on one side of the rotation mechanism, the reduction box is arranged at one end of the rotating shaft, the unqualified product discharging transporting belt is arranged on one side of the reduction box, the qualified product discharging transporting belt is arranged on one side of the unqualified product discharging transporting belt, the distributor is arranged at one end of the qualified product discharging transporting belt, and one end of the reduction box is provided with a polishing barrel and a hole polishing columnarranged on the surface of the polishing barrel. The self-inspection type car door lock assembly polishing equipment is compact and reasonable in design structure, operation is simple, convenient andquick, the automatic operation level is greatly improved, meanwhile, the labor intensity of workers is reduced, the person safety is improved, the product yield is guaranteed, and the very good popularization value is achieved.
Owner:伟速达(荆州)汽车安全系统有限公司

Concrete pouring equipment for bridge construction

The invention discloses concrete pouring equipment for bridge construction, and belongs to the technical field of engineering machinery, the concrete pouring equipment comprises a stirring assembly, a position adjusting assembly and a pouring assembly, the position adjusting assembly is used for realizing integral mounting and fixing of the concrete pouring equipment, the stirring assembly is fixedly mounted on the position adjusting assembly, and the stirring assembly is used for storing concrete; the pouring assembly is installed on the position adjusting assembly, the stirring assembly is connected with the pouring assembly through a hose, the position adjusting assembly is used for adjusting the pouring position and the pouring height of the pouring assembly, the position adjusting assembly is used for driving concrete in the stirring assembly to be stirred at the same time, and the device has the beneficial effects of being ingenious in structure, high in integration degree and high in pouring precision.
Owner:东营市汉泰建筑工程有限公司
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