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1314 results about "Rock crystal" patented technology

Double-force-control automatic compensation method and double-force-control grinding and polishing integrated equipment

The invention discloses a double-force-control automatic compensation method and double-force-control grinding and polishing integrated device.According to the technical scheme, the double-force-control automatic compensation method comprises the steps that workpiece surface crystal orientation data are obtained through a diffraction pattern, and a crystal orientation distribution matrix is generated through denoising and clustering analysis; dividing a crystal orientation region and associating the friction coefficient, hardness and other mechanical properties; based on the material removal rate distribution matrix, a gradient algorithm is adopted to correct grinding tracks and cutting parameters of all areas, and a compensation track matrix is generated; and double-force-control feedback of normal force and tangential force is combined, the abrasive particle contact force and the feeding rate are dynamically adjusted, and a closed-loop compensation strategy is formed. Through crystal orientation partition optimization and double-force-control dynamic compensation, the problem that compensation is insufficient in the grinding process of the glass crystal is solved, and high-precision and self-adaptive surface machining is achieved.
Owner:SHENZHEN PRINTCHECKER INTELLIGENT TECH

Crystal hot-fix rhinestone vacuum coating device and process thereof

The invention relates to the field of vacuum coating, in particular to a crystal hot-fix rhinestone vacuum coating device and a crystal hot-fix rhinestone vacuum coating process. The invention aims to solve the technical problem that the coating quality is reduced in the next coating process due to the fact that original coating materials are easy to accumulate and remain on the surface and in the heating container in the long-term high-temperature state and coating process of the heating container. In order to solve the technical problem, the vacuum coating device for the crystal ironed diamonds comprises a main box body, vacuum equipment is arranged at one end in the main box body, the vacuum equipment comprises a tank body, a plating material evaporation device is arranged in the tank body, the plating material evaporation device comprises a fixing column, the bottom of the fixing column is fixedly connected with the tank body, and the bottom of the fixing column is fixedly connected with the tank body. Threads are arranged outside the lower ends of the fixing columns. The evaporation disc can be replaced through the coating material evaporation device, and the replaced evaporation disc is cleaned, so that the phenomenon that the previous coating raw materials are easy to remain and accumulate around the evaporation disc in the long-term coating process is avoided.
Owner:GUANGZHOU YULONG JEWELRY CO LTD

Crystal form D of OAB-14 and preparation method thereof

The invention belongs to the technical field of OAB-14 medical chemistry and preparation thereof, and particularly relates to a crystal form D of OAB-14 and a preparation method thereof. The preparation method of the crystal form D of OAB-14 comprises the following steps: adding OAB-14 into a solvent, and carrying out suspension pulping, heat preservation stirring, suction filtration and drying to obtain the crystal form D. The solvent is one of THF (tetrahydrofuran), MeOH (methanol), EtOH (methanol), EA (ethyl acetate) and MTBE (methyl tert-butyl ether). The suspension pulping temperature is 15 to 25 DEG C. And the heat-preservation stirring time is 1-5 days. After the OAB-14 is added into the solvent, the concentration of the OAB-14 is 0.005 g / mL to 0.01 g / mL. According to the preparation method of the crystal form D of OAB-14 provided by the invention, the crystal form D is an anhydrous crystal form with high crystallinity, high dissolution rate and high stability.
Owner:SHANDONG XINHUA PHARMA CO LTD

Crystal light-emitting interior trim part

The utility model discloses a crystal light-emitting interior trim part which comprises an interior trim outer plate, a light-transmitting membrane with patterns, a light uniformizing plate, a light gathering plate and a circuit board with lamp beads. The interior trim outer plate is of a light-transmitting structure, and a diamond cutting face structure is arranged on the surface or inside the interior trim outer plate. The interior outer plate, the light-transmitting membrane, the light uniformizing plate, the light gathering plate and the circuit board with the lamp beads are sequentially connected in a clamped mode from outside to inside, and the interior outer plate and the light gathering plate are welded in the lateral direction or the vertical direction to be reinforced and fixed. According to the utility model, the combination of the interior decoration type crystal effect decorating part and the atmosphere lamp realizes the crystal light effect. The effect of the interior atmosphere lamp is enriched, and besides the crystal effect of the surface, the texture of lamplight is also enriched through the application of the light-transmitting film.
Owner:CHERY AUTOMOBILE CO LTD

Detachable portable crystal lamp structure and using method thereof

The invention relates to a detachable portable crystal lamp structure and a using method thereof, and relates to the technical field of crystal table lamps, the detachable portable crystal lamp structure is provided with an adjusting mechanism, the device can be folded through the adjusting mechanism, in the folding process, two auxiliary lampshades can be close to a lamp pole, the longitudinal length of the device is reduced, meanwhile, a crystal lampshade can also descend, and therefore the device can be folded conveniently. The transverse length of the device is reduced, meanwhile, the two auxiliary lampshades enter the main lampshade, the storage space of the device is reduced, the device is convenient to carry and transfer, meanwhile, the two auxiliary lampshades retract into the crystal lampshade, workers only need to wind protection materials on the surface of the crystal lampshade before transfer, use of the protection materials is reduced, and the device is convenient to carry and transfer. The device is placed on a table top through cooperation of the adjusting mechanism and the base mechanism, negative pressure can be generated in all the fixing grooves in the unfolding process of the device through the adjusting mechanism, and therefore the lamp holder and the whole device are fixed to the table top, and the protection effect on the crystal table lamp is achieved.
Owner:ZHEJIANG HONGFU LIGHTING CO LTD

Crystal label printer

The utility model discloses a crystal label printer which comprises a printer main body and release paper, the printer main body is provided with a printing area for the release paper to pass through, and the printer assembly moves on the printer main body and sprays a pattern layer on the release paper. The printing vehicle assembly comprises a first spray head used for spraying a self-adhesive water layer on release paper, a second spray head used for spraying a white ink layer, a third spray head used for spraying a color ink layer, and a fourth spray head used for spraying a curing gloss oil layer and a gold stamping gloss oil layer. Two film covering assemblies are sequentially arranged at the position, located at the output end of the printing area, of the printer body and used for stamping a gold film on the gold stamping gloss oil layer and covering a release paper pattern with a positioning film after the gold film is stamped, and the gold film is stamped on the gold stamping gloss oil layer through the film covering assembly on the front side to achieve the pattern gold stamping effect. The pattern gilding effect can be achieved without secondary operation after pattern transfer printing, and meanwhile the pattern gilding area can be accurately arranged on the pattern.
Owner:TAOTECH DIGITAL TECH

Nondestructive testing specimen method of manufacture and system

A method of manufacture for creating an NDE test specimen with predictably located one or more flaws according to a digital flaw map and of a material having an angle of refraction matching industrial workpieces for testing and training is disclosed. Comprising selecting a workpiece material for the NDE test specimen having a substantially similar angle of refraction to industrial workpieces, fabricating the NDE test specimen from the workpiece material, executing a CAD software on one or more processors of a controller computer, reading the digital flaw map comprising coordinates of the one or more flaws to be applied to the NDE test specimen, controlling a high energy beam CNC to apply the digital flaw map to the NDE test specimen, selecting the workpiece material among crystal, borosilicate glass, and acrylic, applying a laser beam at a plurality of energy points within the NDE test specimen.
Owner:JOHN NYHOLT CONSULTING LLC

High-precision force sensor chip packaging structure and detection method

The invention provides a high-precision force sensor chip packaging structure and a detection method, and the structure comprises a ceramic pedestal, the top end of the ceramic pedestal is provided with a first accommodation groove, the lower part of the first accommodation groove is provided with a second accommodation groove, the second accommodation groove is communicated with the first accommodation groove, the connection part of the first accommodation groove and the second accommodation groove forms an accommodation area, and the first accommodation groove and the second accommodation groove are communicated with each other. A plurality of internal electrodes are arranged in the accommodating area; one end of the crystal chip in the length direction is fixed in the accommodating area, the other end of the crystal chip is suspended, a chip electrode is arranged at the top end of the crystal chip, and an electrode pin of the chip electrode is electrically connected with each internal electrode; the metal sealing ring is arranged at the top end of the ceramic base; the upper cover covers the top end of the metal sealing ring; and the plurality of external electrodes are arranged on the outer side wall of the ceramic base at intervals. The chip packaging structure has the advantages that external force can be effectively transmitted into the oscillation area on the chip, the chip and the packaging structure both have high force frequency coefficients, dynamic and static conditions are detected at the same time, and the high-precision effect of mechanical detection is achieved.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI

Crystal brick edge grinding and polishing device

The utility model relates to the technical field of crystal tile production, and discloses a crystal tile edging and polishing device which comprises a machining table, a mounting frame is fixedly connected to one side of the machining table, a mounting plate is mounted on one side of the upper portion of the mounting frame, a fixing frame is fixedly connected to one side of the mounting frame, and a second servo motor is fixedly connected to the fixing frame. The output end of the second servo motor is fixedly connected with a half gear, one side of the half gear is meshed with a gear, the lower end of the gear is fixedly connected with a mounting rod, one side of the mounting rod is fixedly connected with a mounting frame, and a cleaning brush is mounted on the mounting frame. And the cleaning brush can clean the surface of the grinding disc when moving, brick powder attached to the surface of the grinding disc is reduced, and therefore continuous use of the grinding disc is facilitated, and the problem that the grinding efficiency of the grinding disc is reduced due to the fact that too much brick powder is attached is solved.
Owner:PUJIANG JINGYAGE CRYSTAL CO LTD

UV crystal mark printer winding device capable of integrating printing, waste discharging, gold blocking and film covering

The utility model relates to the technical field of UV crystal marks, and discloses a UV crystal mark printer winding device capable of achieving integration of printing, waste discharging, gold blocking and film covering, the UV crystal mark printer winding device comprises a base, an unwinding roller assembly is arranged on one side of the top of the base, and a mounting frame is arranged on the other side of the top of the base. A waste discharge film unwinding and winding assembly, a gold stamping foil unwinding and winding assembly, a transfer film unwinding assembly and a finished product winding roller are sequentially arranged on one side of the mounting frame from top to bottom. Waste discharge, gold stamping and film covering of a film A are completed through the arrangement of the protective film winding roller, the waste discharge film unwinding and winding assembly, the gold stamping foil unwinding and winding assembly and the transfer film unwinding assembly; the problems that in the prior art, only a common scheme exists, and the finished product effect is single are solved.
Owner:NANJING ZEZHICHEN DIGITAL TECH CO LTD

Crystal-imitating PVD (physical vapor deposition) preparation process

The invention relates to the technical field of automobile part processing, in particular to a crystal-imitating PVD (Physical Vapor Deposition) preparation process which comprises the following technical processes: selecting raw materials for manufacturing parts, and carrying out injection molding to obtain a semi-finished product; carrying out fine carving processing on the formed semi-finished product of the part; the reverse side of the part product is subjected to first PVD spraying; plating an aluminum film on the surface of the product through PVD sputtering plating; the reverse side of the part product is subjected to second PVD spraying; pVD spraying is conducted on the front face of the part product; quality inspection; and packaging and warehousing finished products. The automobile gear lever shifting button part produced through the technical process has the advantages of being high in transparency, bright in color and luster, full in gloss and clear in corner angle, has the crystal texture in appearance, has the good decoration effect, is resistant to abrasion and scraping and is long in service life.
Owner:DONGGUAN GUSONG AUTO PARTS CO LTD

Blasting simulation method and device for crystal intrusive rock

The invention provides a blasting simulation method and device for crystal intruding rock, and the method comprises the steps: building an initial rock crystal sample uniaxial compression model according to the mesoscopic physical parameters of target crystal intruding rock; generating a cohesive force unit for a contact interface between crystal grains in the uniaxial compression model to obtain a uniaxial compression model of the target rock crystal sample; performing a uniaxial compression simulation test on the uniaxial compression model of the target rock crystal sample to obtain test simulation data, correcting parameters through a back analysis method to obtain target material parameters of a target crystal, and constructing a rock crystal medium blasting construction FDEM model; and according to the rock crystal medium blasting construction FDEM model and the blasting parameters, blasting simulation is carried out on the target crystal intruding rock. Therefore, according to the scheme, by designing the finite-discrete coupling blasting simulation method, the cost can be reduced, the time consumption can be reduced, and the dynamic response rule and the damage mechanism of the rock mass in the blasting process can be quantitatively represented.
Owner:中国水利水电第七工程局有限公司 +4

Crystal dust removal device

The invention discloses a crystal dust removal device which comprises a dust removal cylinder connected with an exhaust pipe; the first conical spiral sheet is located in the dust removal cylinder, the first conical spiral sheet is deformable, and one end of the first conical spiral sheet is fixed in the dust removal cylinder; the other end of the conical spiral sheet I is fixedly connected with the connecting piece; the driving mechanism is used for driving the connecting piece to move; the spraying assembly is arranged on the dust removal cylinder, and the spraying assembly is used for spraying water mist into the dust removal cylinder; the flow guide pipe is arranged at the bottom end of the dust removal cylinder; the dust removal effect can be effectively enhanced by causing the first conical spiral piece and the second conical spiral piece to vibrate.
Owner:XUZHOU LIANGMENG SEMICON TECH CO LTD

HIGH-UNIFORMITY SiC CRYSTAL, CRYSTAL BAR, SUBSTRATE AND PREPARATION METHOD THEREOF, AND SEMICONDUCTOR DEVICE

A high-uniformity SiC crystal, a crystal bar, a substrate and a semiconductor device are provided. The SiC crystal is obtained by direct growth through a PVT method without subsequent machining, and includes a facet region and a non-facet region. The facet region is located on an outer-circumference end face of the SiC crystal. A doping concentration change rate of the facet region is 1.5 times or above that of the non-facet region; and / or a carrier concentration change rate of the facet region is 5 times or above that of the non-facet region.
Owner:SICC CO LTD

Adjustable multi-blade crystal cutting knife

The invention discloses an adjustable multi-cutting-edge crystal cutting knife, and belongs to the technical field of crystal machining, the adjustable multi-cutting-edge crystal cutting knife comprises a center shaft, a plurality of blades connected to the center shaft in a sleeving mode and an adjusting mechanism, the blades can axially slide along the center shaft to adapt to different spacing requirements, and the adjusting mechanism comprises a rod part, a plurality of guide grooves and guide blocks. The rod part can rotate in the center shaft, the guide grooves are formed in the side wall of the rod part, each blade is connected with one guide block, each guide block slides in the corresponding guide groove, and therefore the distance between the blades is adjusted, when the center shaft rotates, the multiple blades rotate synchronously, multiple crystals are cut at the same time, and the cutting efficiency is greatly improved. The guide groove drives the guide block to slide, so that the distance between the adjacent blades is changed, and the thickness of the cut crystal is easily adjusted.
Owner:XUZHOU LIANGMENG SEMICON TECH CO LTD

Three-dimensional modular assembly art glass suspended ceiling

The invention discloses a three-dimensional modular assembly art glass suspended ceiling which comprises a hemispherical glass cover arranged in the center of the suspended ceiling. A first stainless steel framework is arranged inside the glass cover, crystal glass square beads are arranged outside the glass cover, and a crystal dish is arranged at the bottom of the glass cover. The first art glass module is arranged on the outer ring of the glass cover and is formed by splicing first art glass assemblies along the circumference; the first art glass assembly is formed by splicing a quadrangle and a triangular second stainless steel framework, and crystal glass square beads are arranged outside the first art glass assembly. The artistic modeling ring is in a circular ring shape and arranged on the outer circle of the first artistic glass module, and an inner groove is formed in the middle of the artistic modeling ring; the second art glass module is arranged on the outer circle of the art modeling ring, and the second art glass module is formed by splicing second art glass assemblies; the second art glass assembly is of a three-dimensional structure formed by splicing third stainless steel frameworks, and crystal glass square beads are arranged outside the third stainless steel frameworks. The modular design is adopted, so that the maintenance process of the glass suspended ceiling is rapid, simple and convenient, the overall strength and stability are high, and the layering sense and the visual impact force are higher.
Owner:SHANGHAI BUILDING DECORATION ENG GRP CO LTD

Vehicle-mounted crystal product polishing size accurate control process and on-line measurement system

The invention relates to the technical field of crystal production, in particular to a vehicle-mounted crystal product polishing size accurate control process and an on-line measurement system, due to the crystal structure and physical characteristics of a vehicle-mounted crystal product, the vehicle-mounted crystal product is a relatively fragile material, and the vehicle-mounted crystal product is not prone to deformation. Therefore, a cutting area is established on the surface of the vehicle-mounted crystal product in advance, the cutting area and a polishing area are accurately recognized through area division, and the symmetrical polishing area is correspondingly recognized and matched in the direction of the central symmetry axis of the vehicle-mounted crystal product by controlling the polishing mode. The two sets of polishing wheels are used for correspondingly recognizing the matched symmetrical polishing areas to conduct polishing control of the feeding speed, the operation angle and the force control from the direction away from each other, then the refined operation of vehicle-mounted crystal polishing is improved, the damage rate of crystal cutting and polishing is reduced, and therefore the ex-factory qualified rate of products is increased.
Owner:DONGGUAN CITY YITAI CRYSTAL CRAFTWORK CO LTD

Crystal hot-fix rhinestone coating device with screening assembly

The utility model discloses a crystal hot fix rhinestone coating device with a screening component, which comprises a support table, a coating machine body, a screening mechanism and a storage mechanism, the screening mechanism comprises a fixing component, a driving component and a screening box, and the screening box is fixedly mounted with the driving component. The driving assembly is arranged on the outer side wall of the fixing assembly and slidably connected with the fixing assembly, a first filter plate, a second filter plate and a bottom plate are sequentially arranged in the screening box from top to bottom, and the surfaces of the first filter plate, the second filter plate and the bottom plate are all inclined planes. A first discharging port and a second discharging port are formed in the two side walls of the screening box and located at the bottom ends of the inclined faces of the surfaces of the first filter plate and the second filter plate correspondingly, a through groove is formed in the bottom face of the screening box and located at the bottom end of the inclined face of the surface of the bottom plate, and the bottom end of the inclined face of the surface of the bottom plate does not make contact with the inner wall of the screening box. According to the hot fix rhinestone collecting device, hot fix rhinestones of different specifications can be collected, workers can recycle the hot fix rhinestones conveniently, meanwhile, the workers can take the hot fix rhinestones meeting the specifications in the storage box conveniently, and the hot fix rhinestones are coated through the coating machine body.
Owner:PUJIANG JINJIE CRYSTAL ARTS & CRAFTS CO LTD

Roller coating gluing process

The invention relates to the technical field of crystal gluing, and particularly discloses a roller coating gluing process. The roller coating gluing process comprises the following steps: surface treatment; processing a coating layer; performing painting treatment; carrying out gluing treatment; carrying out deplating treatment; and cleaning. According to the method, a roller coating painting and gluing mode is adopted, the problem of non-uniformity possibly caused by an existing spraying mode is avoided, the thickness consistency and appearance quality of a paint layer are ensured, transition glue and curing glue are coated on the upper surface of the paint layer in a roller coating mode, good protection is provided for crystals, and the service life of the crystals is prolonged. Damage of an external environment and subsequent processes to a plating layer and a paint layer at the bottom of the crystal is reduced, and the appearance and glossiness of a crystal product are remarkably improved.
Owner:GUANGDONG YIHONGBAO CRYSTAL JEWELRY CO LTD

Wall lamp (crystal shade)

ActiveCN309634461SEngineeringRock crystal
1. Name of the designed product: wall lamp (crystal lamp shade). 2. Use of the designed product: for indoor lighting. 3. Design points of the designed product: in shape. 4. Picture or photo best showing the design points: perspective view. 5. The back view is omitted because it is not easy to see or cannot be seen when in use.
Owner:ZHONGSHAN JINGGUANG XINGHUO LIGHTING TECHNOLOGY CO LTD

Crystal decorative lamp bead

The utility model discloses a crystal decorative lamp bead which comprises a main body made of transparent glass, and the main body is spherical. A protruding block protruding upwards is fixed to the top end of the body, and a hanging hole is formed in the protruding block. A cavity is formed in the main body, and an opening is formed in the bottom of the cavity; a vertically-downward connecting column is fixed to the position, corresponding to the top end of the cavity, in the body, and a bell located in the cavity is arranged below the connecting column. The bell and the connecting column are arranged at an interval, the bell and the connecting column are connected through a first nylon wire, and the top end of the bell and the bottom end of the connecting column are each provided with a wire passing hole for the first nylon wire to penetrate through; the bottom end of the bell is connected with a second nylon wire which is arranged downwards, the bottom end of the second nylon wire is connected with a hanging part, and the hanging part is located below the body. The utility model has the advantage of visual and auditory dual decoration.
Owner:PUJIANG DELANG LIGHTING CO LTD

LED bulb (crystal cover)

ActiveCN309736682SEngineeringRock crystal
1. Name of the designed product: LED bulb (crystal cover). 2. Use of the designed product: indoor lighting. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.
Owner:孙波

Crystal lighting accessories (corner hill)

1. The name of this design product: crystal lighting accessories (corner hill). 2. Application of this design product: indoor lighting accessories. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the key points of the design: Design 1 Stereoscopic Drawing 1. 5. Designate Design 1 as the base design.
Owner:吴相芬

Crystal Chandelier (2)

1. The name of the product of this design: crystal chandelier (2). 2. Purpose of this design product: for indoor lighting. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture. 5. The top view of this design product is a part that is difficult to see or cannot be seen when in use, so the top view is omitted.
Owner:张鹏飞

Chandelier crystal accessories (8836)

1. The name of the product of this design: Chandelier crystal accessories (8836). 2. Purpose of this design product: indoor lighting accessories. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the key points of the design: 3D drawing of Design 1. 5. Designate Design 1 as the base design.
Owner:王军

Chandelier crystal fittings (double-sided round head card slot)

1. Name of the design product: Crystal fitting for chandelier (double-sided round head card slot). 2. Use of the design product: Crystal fitting for assembling indoor chandeliers. 3. Design key points of the design product: Lies in the shape. 4. Picture or photo that best shows the design key points: Perspective view.
Owner:中山市古镇镇俊轩水晶店

Chandelier crystal (multi-faceted square cornered)

1. Name of the designed product: chandelier crystal accessory (multi-faceted flat rhombus). 2. Use of the designed product: indoor lighting decoration accessory. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.
Owner:王军

Mounting groove of lampshade (crystal butterfly)

1. The name of the design product: the installation groove of the lampshade (crystal butterfly type). 2. The use of the design product: for assembling lampshade ornaments. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1. 5. The dotted line in the design is not the protected area, and the solid line area is the requested protection area.
Owner:ZHONGSHAN YUSEN LIGHTING TECH CO LTD

Diamond separating disc and diamond picture set

ActiveCN222329358UReduce the workload of color changingOrnamental structuresMechanical engineeringRock crystal
The utility model discloses a drill distributing disc. Artificial crystals cannot jump out of the drill distributing disc in the process of shaking the drill distributing disc. A rhinestone distributing disc comprises a box body, the box body is provided with a containing space, the top face of the containing space is provided with an opening, a plurality of protruding edges arranged side by side are arranged on the bottom face of the box body, a rhinestone laying groove is formed between every two adjacent protruding edges, the box body is provided with a cover capable of being taken down or opened, and the cover covers the opening.
Owner:邢昱磊

Indoor assembly type crystal brick wall surface mounting and fixing structure

The utility model discloses an indoor assembly type crystal brick wall surface mounting and fixing structure which comprises a crystal brick wall main body which is arranged on the side surface of a wall body base layer and comprises a plurality of glass bricks which are staggered and stacked layer by layer; the vertical penetrating ribs vertically penetrate through the crystal brick wall body, and the ends of the vertical penetrating ribs are located on the upper end face and the lower end face of the wall body base layer respectively. And the back pulling connecting pieces are in butt joint with the crystal brick wall main body and the wall body base layer. The crystal brick wall can solve the problems that an obvious impression gap is formed between the splicing position of the glass bricks and the periphery of a traditional crystal brick wall, the whole transparent impression of the brick wall is affected, the wall body structure strength is insufficient, the material consumption amount is large, the operation is tedious during disassembly and assembly, time and labor are wasted during construction, and the assembly efficiency is low.
Owner:SUZHOU WEILISHI BUILDING & DECORATION ENG CO LTD