1082results about How to "Flexible assembly" patented technology

A method for deploying a cardiac-assist device is disclosed. In accordance with the illustrative embodiment, an introducing tube, such as a catheter, sheath, or the like is inserted into the vascular system and advanced beyond the aortic arch. The cardiac-assist device is then inserted into the tube, advanced through it, and deployed from its distal end. In some embodiments, the diameter of the cardiac-assist device expands when it deploys from the distal end of the tube.

A modular light emitting diode is disclosed. The modular light emitting diode comprises a heat-sinking base, a circuit board, a LED light emitting device, and a waterproofing layer. A protrudent portion and a plurality of trenches are formed on the surface of the heat-sinking base. Waterproof connection terminals are mounted on both sides of the circuit board. The LED light emitting device is mounted on and connected to the circuit board so as to form a complete circuit. Thereafter, the circuit board on which the LED light emitting device is mounted is stacked on the heat-sinking base to allow the LED light emitting device to be mounted on the protrudent portion of the heat-sinking base. These three stacked components are locally packaged by a waterproofing layer to complete the modular light emitting diode having the advantages of good waterproofing, rapid heat sinking, and flexible assembly.

An optical fiber interconnection system with a small number of modular components that can be configured for simple construction in many configurations. The system includes connector housings. Optical fibers are installed into the housings on ferrule carriers. The housings are brought together in adapters. Different styles of adapters are available for different applications, such as panel or backplane configurations. However, the same housing and ferrule carriers can be used in any style of adapter. Also, different ferrule carriers are provided for single fiber ferrules and multi-fiber ferrules. Either style of ferrule carrier can be used in a housing and adapter. A ferrule carrier for single fiber ferrules can be modified to provide fine alignment features with the addition of a cap, allowing the same style ferrule carrier to be used in both halves of a mated connector assembly.

An inflatable furniture assembly of has a plurality of inflatable cushions, inflation valves, covers, and connecting elements. The inflatable furniture assembly is formed from the plurality of inflatable cushions; each inflatable cushion has an inflation valve and can be covered by a cover to form a unit with an improved appearance. The cover comprises at least one opening corresponding to the inflation valve so that each unit can be inflated. Each unit has at least one connecting element that comprises self-adhesive tape or connecting rod so the units can be combined with the self-adhesive tape to form the inflatable furniture assembly.

The invention relates to a two-layer cell culture system organ chip and a preparation method thereof. The organ chip comprises a two-layer cell culture system, wherein each layer comprises a culture solution micro-fluid channel, a medicament micro-fluid channel, cell culture chambers and a medicament testing tank; a micro structure and micro-fluid channels are designed on the organ chip, two cells are respectively fixed on each specific cell culture chamber, and intercellular signal transmission and interaction between the cells are performed by virtue of the micro-fluid channels. The organ chip realizes the parallel implantation and co-culture of two or more cells, is simple in operation, reduces the dose of practical samples, simplifies the cell implantation process, has the characteristics of portability, economic performance, high efficiency and accuracy, and can be used for independently performing cell seeding and culture and detection of medicament toxicity or pharmacological activity. The two-layer cell culture system organ chip is a novel organ chip with miniaturization, automation and visualization, prepared by simulating the structures and functions of a human organ, and can be used for providing the effective theoretical basis for tissue and regeneration engineering, organ transplantation and medicament evaluation.

The invention discloses a subway station deep foundation pit excavation construction method, wherein the upper portion of an excavated foundation pit is a sandy gravel stratum, and the lower portion of the excavated foundation pit is a mud rock stratum. The method includes the steps of 1, precipitation construction, wherein precipitation construction is conducted on the sandy gravel stratum through a precipitation well and 2, foundation pit excavation, wherein the foundation pit excavation includes the following steps of foundation pit partition and foundation pit earthwork excavation; the excavated foundation pit is divided into a plurality of small foundation pit bodies to conduct excavation respectively; the small foundation pits comprise first foundation pit bodies and second foundation pit bodies; excavation is conducted on the divided small foundation pit bodies; an open-cut method is adopted for the first foundation pit bodies and the second foundation pit bodies; the first foundation pit bodies are supported by fender posts, reinforced concrete supports and steel pipe inner supports; the second foundation pit bodies are supported by the fender posts, pre-stressed anchor cables and the steel pipe inner supports. The subway station deep foundation pit excavation construction method is simple in step, reasonable in design, convenient to construct, faster in construction process, good in construction effect and capable of easily conveniently and fast to finish deep foundation pit excavation construction process, and the influences on the surrounding environment by the excavation construction process are smaller.

The invention relates to a power battery module of an electric vehicle and an electric vehicle. The power battery module comprises cells, an upper cover, a middle end plate, two oppositely arranged end plates, and two oppositely arranged lateral plates. Two end plates are respectively welded to two lateral plates to form a shell without any bottom surface or a top surface. The middle end plate iswelded to two lateral plates so as to divide the interior of the shell into at least two installation cavities. Multiple cells are installed in each installation cavity. The upper cover is arranged onthe upper end of the shell. The overall installation structure is formed by connecting the middle end plate, the end plates, and the lateral plates, the number of stored cells is increased, the number of stored cells is equal to the number of cells of two or more individual modules, compared with two or more individual modules, the size is reduced in the length direction, the module length is increased, the occupied space is small, the uniformity of the module is increased, the inner space is saved, the whole structure of the module is more compact, the space utilization rate is increased, and thus the energy density and capacity of the whole battery system are both increased.

The invention relates to a skin / textile biologic friction dynamic measurement device, which comprises a measurement base, wherein a vertical seat is fixed at the rear part of the measurement base; a first sliding way and a second sliding way are installed at the front part of the measurement base; the first sliding way is installed on a movable panel of the second sliding way; a measurement panel is also installed on the first sliding way; an installation panel which can move up and down is arranged at the front side of the vertical seat; a measurement contact is fixed on the installation panel and is positioned above the measurement panel; a multi-axial force / torque transducer is installed between the measurement contact and the installation panel; the multi-axial force / torque transducer is connected with a data processing system of a personal computer through a power supply box; the first sliding way can make the measurement panel move left and right; the second sliding way can make the movable panel move back and forth; and the installation panel can move up and down. The device not only can measure the frictional force, pressure and torque functions during the contact sliding process in real time, but also can truly reflect the skin / textile multidirectional contact friction movement process under different sliding speeds and initial pressures.

The invention discloses a template structure and a method for template support of a cast-in-place concrete arc-shaped terrace. The template structure comprises a template support frame body and a template fixing system, wherein the template fixing system comprises arc-shaped beam bottom plate templates, seat plate bottom templates, arc-shaped beam outside upper templates, arc-shaped beam outside lower templates and arc-shaped beam inside templates, wherein the arc-shaped beam outside lower templates are positioned below the arc-shaped beam outside upper templates; internal supports are arranged between the arc-shaped beam outside upper templates and the arc-shaped beam inside templates for supporting and enable the arc-shaped beam outside upper templates and the arc-shaped beam inside templates to keep set intervals; split bolts are used for connecting and fixing the arc-shaped beam outside upper templates and the arc-shaped beam inside templates; split bolts are used for connecting and fixing the arc-shaped beam outside lower templates and the arc-shaped beam inside templates; the arc-shaped beam bottom plate templates are respectively connected and fixed with the bottom ends of the arc-shaped beam outside lower templates and the arc-shaped beam inside templates; the seat plate bottom templates are respectively connected and fixed with the upper ends of the arc-shaped beam outside lower templates and the arc-shaped beam inside templates.

The invention discloses a mobile soil washing apparatus and a method thereof, which relate to the technical field of environment protection. The mobile soil washing apparatus mainly comprises a double-deck vibrating sieve combination device for the purpose of wet type soil sieving, a mobile washing device for washing sieved soil, a mobile wastewater treatment device for treating a washing solution (which can be replaced by a temporary civil sewage treatment facility), and a gas extracting and activated carbon adsorption device for extracting gas generated in a washing process, wherein a small-sized belt conveyor is used for conveying the sieved soil between the vibrating sieve combination device and the washing device. By virtue of the soil washing apparatus, flexible apparatus assembly and washing treatment can be carried out on the soil or bottom mud containing various pollutants in different occasions, and innovative optimization is carried out on a traditional soil washing process from the perspective of resource recovery according to different distributions of the pollutants in soil with different particle size ranges.

The invention discloses a novel double shear wall deformation joint mould plate. Forming mould plate system on each side comprises a panel, wherein vertical wood keels are fixed outside the panel by iron nails, horizontal keels are arranged outside the vertical wood keels, the horizontal keels are made of steel pipes, and each two steel pipes are closely arranged; the two adjacent steel pipes of the forming mould plate system on one side are welded with a steel plate provided with a screw rod hole, a nut of a double-pulling screw rod is welded in the screw rod hole; the horizontal keels of the forming mould plate system on the other side are provided with a reverse M-shaped clip used to fix the double-pulling screw rod; the double-pulling screw rod passes through the forming mould plate system on the left side and the forming mould plate system on the right side, and is fixed by the steel plates and the nut in the reverse M-shaped clip; a wall plate thickness limitation support is arranged between the panels of the forming mould plate system on the left side and the forming mould plate system on the right side; the double-pulling screw rod is sleeved by a plastic sleeve, both ends of which are inserted in the panels of the forming mould plate system on the left side and the forming mould plate system on the right side respectively. The mould plate of the invention has the advantages of reasonable structure, cost conservation, short construction period, convenient use, flexible assembly, high repeated use rate and good constructional safety.

The invention discloses an odor biological treatment process and a device in environmental engineering, meanwhile, the invention discloses a process for removing a plurality of mixed obnoxious gases and a device, which is characterized in that a trickling bio-filter A is arranged, the gas to be treated is pressurized by a draught fan to be delivered to an air pretreatment device, then the gas enters into a gas distributor at the lower part of the trickling bio-filter A, thereby carrying out the reactions of filtration, adsorption, degrading and biochemical when passing through a biological carrier and removing H2S; a trickling bio-filter B is arranged, the gas comes from the top of the trickling bio-filter A and enters into the trickling bio-filter B from the bottom of the trickling bio-filter A, which can pass through the biological carrier to remove volatile organic compounding exhaust gases; the trickling bio-filter A and the trickling bio-filter B are respectively provided with a spraying liquid A and a spraying liquid B, and the spraying liquid A and the spraying liquid B enter into the biological carrier from top to down. The process and the device have the advantages that the obnoxious gases are removed with different grades; the device is flexible and convenient to manufacture, assembly and disassembly with low cost; the trickling bio-filter B is provided with a multi-grade biological carrier; the trickling bio-filter A and the trickling bio-filter B are respectively sprayed with the spraying liquid A, the spraying liquid B and nutrient fluid thereof, which is convenient to operate, easy to adjust and are capable of removing a plurality of obnoxious gases with good treatment effect and strong ability against load impacts.

The invention discloses a combined type adjustable compound ecological floating island. A main body structure of the combined type adjustable compound ecological floating island comprises fixing columns, a floating island frame and plant planting baskets. The lower end of each fixing column is inserted into a cement cubic anchor, and sinks into water, and the upper end of each fixing column is 30cm-60cm higher than the water surface. The floating island frame is in a net structure, is divided into two layers including an upper layer and a lower layer, and is connected with the fixing columns through fixing holes at four corners of the floating island frame in an inserting mode. The plant planting baskets are independently arranged, and are buckled with the floating island frame. Plant planting baskets fixed on the surface layer of the floating island frame are used for planting emergent aquatic plants, such as cattails and cypella herbertii, and plant planting baskets fixed on the lower layer of the floating island frame are used for planting submerged plants, such as hornworts and eel grass, and are fixed through light materials, such as haydite and vermiculite. Biological film filler is hung on the lower portions of the plant planting baskets. The combined type adjustable compound ecological floating island is simple in structure, and facilitates industrial production. Each layer of the combined type adjustable compound ecological floating island can be adjusted to a reasonable depth according to water depth, water body transparency and illumination conditions so as to adapt to different water bodies and requirements. Synergistic effects of the emergent aquatic plants, the submerged plants and microorganism are made full use of, and a removal effect is good.

The invention provides a self-selective differential-steering conveying device, which comprises an upper course input mechanism (1), a differential conveying mechanism (2) and a lower course output mechanism (3) which are connected in sequence, and guide guardrails(4,4') which are arranged on both sides of the upper course input mechanism, the differential conveying mechanism and the lower course output mechanism; the distance between the two guide guardrails(4,4') is larger than the diagonal length of the conveyed materials with minimal dimension and is less than the diagonal length of the conveyed materials with maximal dimension; the differential conveying mechanism consists of two conveying mechanisms (2a, 2b) with different conveying speeds in parallel; and the conveying surface (3a) of the lower course output mechanism is a web roll conveying surface. When the conveying device conveys the materials with different outside dimensions, the conveying device does not need to be provided with detecting equipment, can automatically turn the materials with smaller dimension 90 DEG and then output the materials, and can output the materials with larger dimension without turning so as to solve the problems that the equipment investment is large, the system resource is consumed, the equipment service life is influenced, and the like.

The invention provides a formwork creeping method for a novel 1.6 parabola-shaped four-column type hollow variable section high pier. The method comprises the following steps: burying an embedded part into concrete; mounting a guide rail on the embedded part; realizing the climbing of a formwork system by utilizing the interaction between the guide rail and a pylon. The process of formwork creeping is that mounting a lower frame body, mounting an upper frame body, pouring concrete, moving the upper frame body backwards, moving upwards and fixing the guide rail, moving upwards the hydraulic pressure of the frame bodies, moving forwards the upper frame body, and pouring concrete at the next section. According to the invention, the formwork creeping method is ingenious in conception, enables the erecting structure of a 1.6 parabola-shaped high pier formwork to be reasonable, is safe to use, flexible to assemble, and convenient to refit, saves construction cost, and greatly shortens construction period.

The invention discloses a system for reinforcing a sand-contained soil interlayer soft foundation in a vacuum-electro-osmosis combination mode. The system is composed of subsection EKG drainage electrodes, flexible conductive joints, conductive circuits, a direct-current power supply, a power supply control system, plastic drainage boards, horizontal drainage pipelines, a vacuum pump and the like. The subsection EKG drainage electrodes are connected with one another through the flexible conductive joints, the rough drainage electrodes are used in a soft soil layer, the fine drainage electrodes are used in a sand soil layer, each fine drainage electrode is sleeved with a corrosion-resistant insulating rubber tube, and part, located on a sand soil interlayer, of the drainage boards are wound with a ring of water-proof material through strong water-proof adhesives. The invention further discloses a use method of the system, static sounding is conducted on the positions of the drainage electrodes and the positions of the drainage boards, processing and assembling are conducted on the drainage boards and the drainage electrodes according to results, and finally the soft foundation is reinforced in the vacuum pre-compaction and electro-osmosis drainage combination mode. The system can reinforce the sand-contained soil interlayer soft foundation by combining a vacuum pre-compaction ground treatment method and an electro-osmosis drainage ground treatment method.

The invention relates to a combined shielding plate for a high-speed connector. The combined shielding plate is formed by combining a group of n parallel shielding plates with a group of m parallel shielding plates in a crossed manner. Each shielding plate is formed by integrally stamping a metal plate. In the assembling process, the two groups of shielding plates only need to be assembled in a crossed manner so as to form n*m shielding plate units. An included angle between two shielding plates in each shielding plate unit is in the range of 60 degrees to 130 degrees. In the assembling process, only n+m shielding plates need to be assembled, and thus, compared with the prior art in which n*m shielding plates need to be assembled, the production process is greatly simplified. Moreover, the manufacture of the shielding plates can be completed by carrying out integrated stamping forming on the metal plates without preparing the single shielding plate, and thus, the production efficiencyis greatly improved and the production cost is reduced. Moreover, the application of the combined shielding plate also greatly improves the reliability of an electric connector.

A refrigerating machine room assembly type construction method based on a BIM technology comprises four stages, namely a deepening design stage, a prefabrication machining stage, a transportation stage and a field assembly stage. According to the method, a designed construction drawing is combined with a construction site, electromechanical professions are comprehensively planned, civil engineering, curtain walls, decoration and other acceptance units are connected, and the problem of serious difficulty in construction and key areas are pre-judged. The method has the advantages that on-site construction is guided, engineering quality is improved, guarantee is provided for engineering progress, project cost is saved, completion data is input into the building information model finally, system maintenance and use during project operation are facilitated, and expected functions of buildings are achieved finally and added value is increased. Compared with a traditional refrigerator room construction method, the construction method adopting the prefabricated assembly refrigerator room has remarkable advancement and advantages in the aspects of construction period, quality, safety, manufacturing cost and other technical and economic effects.

The invention discloses a shooting training device with the automatic target number reporting function achieved through acousto-optic combined positioning. The shooting training device comprises a target rack body (1), a target mark (2), laser light sources (3), light sensors (4), acoustic sensors (5) and an acousto-optic combined signal processing circuit board (6). The target rack body (1) is of a rectangular box structure. The target mark (2) is arranged on a front panel of the target rack body (1). The acoustic sensors (5) are installed on the periphery of the target rack body (1). The laser light sources (3) are installed on an upper panel or a lower panel of the target rack body (1). The light sensors (4) are installed within the scanning range of the laser light sources (3). The automatic target number reporting mode with sound waves and a laser curtain combined is adopted in the shooting training device, positioning of the whole target mark is covered with the sound waves, the light-sound overlapped area positioning with the highest usage rate is covered with the laser curtain, the advantages of the sound waves and the laser curtain are utilized, the defects of the sound waves and the laser curtain are overcome, it can be guaranteed that reports are not missed when the target mark is damaged, and the target number reporting precision is high.

The invention belongs to the field of preparation of metal ultrafine powder materials and particularly relates to a method for continuously preparing ultrafine sliver powder on the basis of a microchannel mixed reaction system. According to the method, an oxidation solution containing soluble silver salt and nitric acid and a reduction solution containing ascorbic acid or sodium ascorbate are continuously conveyed to the microchannel mixed reaction system respectively through driving devices, mixing is carried out in a Y-type tee joint or a tee joint in the microchannel mixed reaction system, wherein the Y-type tee joint or the tee joint serves as a mixing unit of reactive materials, the mixed solutions flow out of reaction microchannels after being subjected to a reaction in the reaction microchannels in the microchannel mixed reaction system, standing is carried out on obtained reaction products, washing and sediment are carried out on the products, and ultrafine sliver powder of different morphologies and sizes can be obtained after suction filtration and drying. According to the method, control over the crystallization morphologies and the sizes of ultrafine sliver powder particle products can be achieved by adjusting the components of the oxidation solution, the components of the reduction solution, the molar concentration, the temperature and other parameters.

The invention discloses a soil washing device and a washing method thereof. The washing device comprises a particle grading unit, a soil washing unit and a sewage treatment unit, wherein the particle grading unit is used for separating soil into particles with different particle sizes, the soil washing unit is used for washing the separated soil particles by adding an agent and clean water, and the sewage treatment unit is used for performing solid liquid separation on washed soil, a separated filter cake is improved, then backfilling is performed, and deep treatment is performed on separated sewage. Particle size grading is performed on polluted soil for multiple times, then soil with a particle size range in which target pollutants exist intensively and a leaching agent are mixed and added into a leaching reactor, multi-stage washing is performed by controlling certain conditions, the washed soil is separated out, then backfilling or deep treatment is performed, and liquid waste gathering the pollutants is treated and then is discharged or reused.

The invention discloses a friction pendulum support equipped with annular steel plates. The friction pendulum support comprises upper anchoring rods, an upper support plate, high-strength bolts, a ball crown, an upper wear-resisting plate, the annular steel plates, a lower wear-resisting plate, a lower support plate, lower anchoring rods and a sliding surface, wherein the upper support plate and the upper wear-resisting plate are in cylindrical surface contact; the lower support plate and the lower wear-resisting plate are in cylindrical surface contact; the ball crown is in spherical surface contact with the upper support plate and the lower support plate, the upper part of the ball crown is hinged with the upper wear-resisting plate, the annular steel plates are mounted between the upper support plate and the lower support plate, the upper ends of the annular steel plates are anchored at the bottom of the upper support plate by the high-strength bolts, and the lower ends of the annular steel plates are anchored at the top of the lower support plate by the high-strength bolts. The friction pendulum support can provide an additional damping ratio for the structure, change the natural vibration period of the upper structure, reduce the structure earthquake response, limit relative displacement between the upper structure and the lower structure and finally prevent the upper part and the lower part from being separated, so that the upper structure cannot be overturned.

The invention relates to a solar-energy translation type sprinkling machine comprising a main rack body. The main rack body is formed by a master beam and a rack arranged under the master beam, wherein a walking mechanism is arranged under the rack; water pipes are fixed on the master beam; two sides of the master beam are respectively provided with a suspension arm mechanism horizontally extending outward; each suspension arm mechanism is fixed via a traction rope; a water outlet end of each water pipe extends along the suspension arm mechanisms on two sides via branching and connected with a plurality of water spraying devices on the lower ends of the suspension arm mechanisms respectively; one side of each suspension arm mechanism is fixedly connected with a balance universal wheel via a first telescopic support and the other side is connected with a second telescopic support; and the second telescopic support is connected with a bearing groove. The sprinkling machine is advantaged by energy conservation, high efficiency, convenient use, great balance property and crop rolling resistance.

The invention relates to a soil taking device and a soil taking method, belonging to the field of geotechnical engineering investigation in civil engineering. The soil taking device of a starting side opening of a movable doorseal comprises a drill part and a tube body part. The soil taking device is characterized in that the tube body part comprises a plurality of sections of soil taking tubes; each section of soil taking tubes comprises a plurality of sections of soil takers; the sections of the soil takers are in threaded connection; isolations are arranged at the threaded parts; soil entering holes are formed in the isolations of the soil taker; and movable doors which fit for shapes and sizes of the soil entering holes are installed on the soil entering holes. The soil taking method of the soil taking device of the starting side opening of the movable doorseal is simple in equipment and easy to operate, the soil can be taken rapidly and conveniently, and the soil taking device can be used as a device special for rapidly measuring the cement content of a cement mixing pile and judging a thin interlayer.

The invention discloses a molten titanium and titanium alloy crucible which is at least formed by combining a crucible shell and a crucible lining, wherein the crucible lining is of an opened structure capable of holding a melt and is made of a composite material; the crucible shell is made of a high-temperature-resistant material with a high melting point and is of a force bearing structure capable of bearing pressure generated by titanium melts and titanium alloy melts; the crucible lining is made of a sintered composite prepared by mixing the following main components: 45-70wt% of barium oxide, 30-50wt% of zirconium oxide and 0-5wt% of fluxing agent, wherein the fluxing agent is titanium oxide, aluminum oxide or boron oxide. The invention also discloses a preparation method of the crucible; the crucible lining is assembled in a way of stacking and combining sintered bricks and can be disassembled in a decomposition way. An inner layer material of the crucible disclosed by the invention does not react with titanium; in addition, the crucible is nonstick, capable of meeting the requirements of industrialization, large capacity, low cost, easiness for maintenance and long service life, reasonable in structure and mature in preparation process.

The invention provides an underwater cast-in-place concrete pile elevation control device and a using method thereof. The control device comprises a material taking tube and a telescopic scale, and is characterized in that the telescopic scale is hollow and is fixedly arranged at the upper end of the material taking tube; the material taking tube is a cylinder of which the lower end is open, multiple mud holes of which the diameter is smaller than the particle size of underwater concrete and is larger than the particle size of mud are formed in the wall of the cylinder; only mud can penetrate through the mud holes, and concrete cannot penetrate through the mud holes; a lower end cover which is open towards the interior of the tube in an open manner is arranged at a lower opening of the material taking tube; a vibration block of which the specific gravity is higher than specific gravity of the mud and is lower than the specific gravity of concrete is suspended in the material taking tube. The device is simple in structure, convenient in operation, easy to detach and flexible in assembly and can be repeatedly utilized by different types of underwater cast-in-place concrete piles, and the pile block elevation and concrete super-fusion height of the underwater cast-in-place concrete pile can be effectively controlled. Moreover, the production cost of construction projects can be effectively reduced, and high economic benefits can be obtained.

The invention discloses a bullet-proof plate with a buffering isolation layer. The bullet-proof plate comprises at least one buffering isolation layer and at least two layers of bullet-proof substrates made of a high-performance fiber material. The buffering isolation layer is arranged between the two adjacent layers of bullet-proof substrates. A manufacturing method of the bullet-proof plate includes the following steps: (1) a bullet-proof substrate manufacturing step; (2) a buffering isolation layer manufacturing step; (3) an assembling and fixing step; and (4) a post-processing step. The bullet-proof plate with the buffering isolation layer has the advantage that under the same areal density, bullet-proof performance is higher; under the same protection level, areal density is lower, and the thickness is smaller; the bullet-proof plate suitable for different bullet-proof levels can be assembled flexibly through a few types of substrates of appropriate thickness specifications; and the bullet-proof substrate thickness specifications are fewer so that production is simplified, operation is convenient, production efficiency is improved, the production process is stable, and product quality is stable.