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126results about How to "Waterproof and reliable" patented technology

Structure for preventing water at back of tunnel lining from longitudinally streaming

The invention relates to a structure for preventing water at the back of a tunnel lining from longitudinally streaming, which is characterized in that: at least one convex water blocking ring is arranged on the outer surface of a secondary lining corresponding to a waterproof board along the circumferential direction; and the water blocking ring cuts off the waterproof board and a longitudinal water drain pipe and penetrates into a primary support and an adjoining rock so as to prevent underground water from longitudinally streaming. The structure can realize the zonal and sectional drainage of a tunnel in sections with different watery degrees; and a tunnel waterproof and drainage system is pertinently arranged according to the watery degree of the underground water, so that the requirement on the drainage capacity of the tunnel is met, engineering cost is saved, maintenance cost is reduced, and the phenomena of cracking, leakage, water jetting and the like of weak sections of the lining caused by the streaming of the underground water at the back of the lining are avoided.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP

Polyurethane waterproof roll, production equipment and process, composite waterproof layer and practice thereof

The invention provides a polyurethane waterproof roll, production equipment and process, a composite waterproof layer and practice thereof. A method of achieving the composite waterproof layer comprises the steps that firstly, underlayer polyurethane waterproof coating is manufactured, then the upper-layer polyurethane waterproof roll is manufactured, and the coating and the roll are bonded into an organic integrity which has certain interface shearing and peeling strength by the coating. Through the polyurethane waterproof roll, the solidification and film forming process of the polyurethane waterproof coating which is achieved at the construction site previously is moved forward, the polyurethane waterproof roll is produced ready in a factory through special equipment, the thickness is uniform and consistent, and the category and function are diversified. By means of seamless connection characteristic of the coating and uniform thickness characteristic of the roll, quality of a waterproofing project can be improved. The practice has the advantages that the coating and the roll are compatible in material property, the coating is smooth to cure and large in cohesive force, the cohesion between the coating and a substrate is powerful, the roll is tight to overlap or in butt joint, the coating is bonded to the roll sufficiently, the construction site demands no open fire or electrical heating operation, the safety, energy conservation and environmental protection are achieved, and the characteristic of 'liquid rubber' of the polyurethane material is given full play.
Owner:辛永刚 +1

Circuit module and electric vehicle including the same

The present invention provides a circuit module which is reliably waterproof and in which wires can be easily replaced, and an electric vehicle including the same. A circuit board is accommodated in an internal space of a main body casing (10c), and a bus bar (BB) electrically connected to the circuit board is drawn out of the main body casing(10c). The bus bar(BB) is held in an internal region of a terminal holder positioned outside the main body casing(10c). One end of a harness (21) is connected to the bus bar(BB) in the internal region of the terminal holder(11), and the other end of the harness (21) is drawn out to an external space. In this state, a joint region of terminal covers(12a, 12c) is joined to a joint region of the terminal holder(11).
Owner:SANYO ELECTRIC CO LTD

Sensor for observations in liquid environments and observation apparatus for use in liquid environments

The sensor has the self-detecting probe including a body portion, an elongated belt-like flexible substrate, connecting members, a resinous portion, and external contacts formed at the ends of the flexible substrate brought out of liquid. The probe further includes a cantilever whose base end is supported to the body portion, a strain resistive element whose resistance value varies according to the amount of displacement of the cantilever, and interconnects electrically connected with the strain resistive element. A probe tip is formed at the front end of the cantilever. The flexible substrate has an interconnect pattern sandwiched between two insulating sheets. The flexible substrate supports the body portion while the cantilever protrudes outwardly. At least one end of the flexible substrate is brought out of liquid. The connecting members connect the interconnects with the interconnect pattern. The interconnects, connecting members, and the portions of the connecting members electrically connected with the interconnect pattern are coated with the resinous portion.
Owner:HITACHI HIGH TECH SCI CORP

Modified asphalt waterproof coiled material with reinforced overlap edges and production method of modified asphalt waterproof coiled material

The invention relates to a modified asphalt waterproof coiled material with reinforced overlap edges and a production method of the modified asphalt waterproof coiled material. The modified asphalt waterproof coiled material comprises a main body material layer, a modified asphalt layer and an isolating membrane, wherein two strips of fiber cloth are respectively embedded between the parts, which are respectively 0.1-1cm away from the edges of the two sides along the longitudinal direction of the modified asphalt layer, and the isolating membrane, so that the overlap edges are formed. After the method is adopted, the mechanical properties of the overlap edges are obviously improved after the modified asphalt waterproof coiled material is molded, so that the water resistance of the modified asphalt waterproof coiled material is more reliable; the production method provided by the invention solves the problems that in the traditional production process, due to mechanical mismatch of the left side and the right side of the coiled material, the coiled material is neat when being coiled and is twisted when being unfolded, and the like, and improves the quality of the waterproof coiled material.
Owner:XI NIU PI WATERPROOFING TECH CO LTD

Folding water-storing water-retaining water wall

The invention relates to a folding water-storing water-retaining water wall, comprising more than one water bag units; the water bag unit comprises a flexible water bag and more than two skeletons; the flexible water bag forms an enclosed water storage space; the inner wall of the flexible water bag is provided with a silica gel layer; the skeletons are arranged on the flexible water bag and tightly connected and fixed with the flexible water bag; the water bag unit is provided with a fixing device; a connecting ring is arranged on the skeletons of the two ends of the flexible water bag in the water bag unit; a connecting piece is arranged between the adjacent connecting rings on the adjacent water bag units; the water bag unit is provided with a locking device; the flexible water bag is provided with a water inlet and a water outlet; and a sealing device is arranged between the water bag units. The structure of the folding water-storing water-retaining water wall can fast build and dismantle the water-storing water-retaining water wall, is convenient to transport and carry and has reliable water retaining.
Owner:黄文勇

Novel waterproof structure of construction engineering and waterproof construction method

The invention provides a novel waterproof structure of construction engineering and a waterproof construction method, which can solve the problems that the lap joint parts are difficult to be completely and closely attached and the waterproof effect is bad in the waterproof structure and waterproof construction method of coiled materials in the prior art. The novel waterproof structure of construction engineering comprises a base surface and a waterproof layer provided with no lap seam entirely and formed by a basic layer and modified asphalt layers on the upper and lower surfaces of the basic layer. The waterproof construction method comprises the steps as follows: cleaning the base surface; heating and spraying the modified asphalt; paving the base; and spraying modified asphalt to construct a waterproof layer. As the waterproof structure does not have lap seam entirely, a completely-sealed waterproof effect like skin can be achieved; and moreover, the waterproof construction method can realize construction without lap seam, has more advantages in construction of special parts and ensures reliable waterproof effect.
Owner:QINGDAO MINGHUI ARCHITECTURE DECORATE ENGCO

Rubber asphalt-based material used for concrete structured expansion joints, and preparation method thereof

The invention provides a rubber asphalt-based material used for concrete structured expansion joints. The rubber asphalt-based material comprises by mass, 35-45% of asphalt, 20-30%of softening oil, 10-20% of a modifier, 0-5% of a polyolefin elastomer, 0-6% of a plasticizer, 5-15% of tackifying resin, 0-3% of a viscosity adjuster, 0-5% of an interface agent and 0-3% of a special asphalt additive. Compared with silicone rubber and urethane room temperature sealants, the rubber asphalt-based material provided by the invention has the advantages of low requirements of bases, good wet interface cohesiveness, good weatherability, good durability, extremely excellent sealing effect and low price.
Owner:METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI +2

Rechargeable Bicycle Light System

A bicycle tail light or front light has a mounting base to connect to the bicycle, and an LED light unit for insertion into and removal from the base. The light unit includes a printed circuit board with LED driver and a rechargeable battery, all of which are encapsulated by a direct overmolding that forms a casing for the unit. For charging the light unit is pulled out from the base and plugged into a USB port. A tongue with USB blade at the back of the light unit functions to secure the light unit to the mounting base, and the attachment of the units switches power to the light unit. A motion detector on the PCB shuts off the LED if no motion is detected for several minutes, thus eliminating need for any exterior switch.
Owner:LIGHT & MOTION INDS

Long auger rotary-jet mixing steel reinforced cement-soil pile foundation pit water-resisting and supporting method

The invention relates to a long auger rotary-jet mixing steel reinforced cement-soil pile foundation pit water-resisting and supporting method. An undisturbed soil layer is subjected to rotary-jet mixing on the spot through using the characteristic that a transformed long auger drilling tool with a bit is more adaptive to harder pans, the undisturbed soil layer is stirred and filled with grout at the same time to the designed elevation, the long auger drilling tool is pulled out to finish the construction of the cement-soil piles, and then reinforced materials such as shape steel are inserted into the top ends of the cement-soil piles to form columnar reinforced cement-soil pile bodies with certain strength and anti-permeability performance. The method has the advantages that the pile bodies can be driven in the harder pans to the designed depth and the designed pile diameter; through the occlusion of the pile bodies, the closed continuous pile wall body can be formed, and the reliability of a waterproof curtain is improved; and in order to increase the rigidity and the strength of the pile wall body, cement-soil is mixed and then inserted into the reinforced materials such as the shape steel, so as to ensure water-resistance reliability and the foundation pit safety. The method is applied to wide stratum ranges, and has superior advantages in harder pans in northern areas. The shape steel, an anchor rod or an inner support can be recycled, so that the cost is reduced.
Owner:北京建材地质工程有限公司 +2

Assembly type bathroom and installing method thereof

The invention discloses an assembly type bathroom and an installing method thereof. The assembly type bathroom comprises bases arranged on the ground, a bottom keel arranged around the bases, a wall face structure arranged on the bottom keel, a top keel arranged on the wall face structure, and a top panel fixedly arranged on the top keel. The bases of the bathroom are the independent dry area base and wet area base, installation and transport are convenient, and a wall face and a ceiling are fixedly installed through the keels. The assembly type bathroom is simple in structure, modular and standardized production of a factory is achieved, water resistance and reliability are achieved, quality is stable, site construction is simple and fast, and assembly type decoration is facilitated to be developed better.
Owner:宁波群住住宅科技有限公司

Cold construction adhesive for waterproof rolled sheet

The present invention discloses one kind of adhesive for composite waterproof rolled sheet product and its production process. The adhesive consists of water-thinned latex or water soluble glue powder, water reducing agent, cellulose and additive. It has high adhesion effect, wide use range, high strength, waterproof function, and may be used in the construction of modified waterproof asphalt rolled sheet and polymer sheet with fabric on the surface of new and old concrete and in the repair and waterproof sealing of concrete.
Owner:XI NIU PI WATERPROOFING TECH CO LTD

Waterproof undercarriage for bathroom

The invention provides a waterproof undercarriage for a bathroom. The waterproof undercarriage comprises a waterproof base plate provided with a circle of vertical retaining side, a supporting keel laid on the waterproof base plate, and a decorative layer which is laid on upper end face of the supporting keel, wherein the upper edge of the retaining side is not lower than the top face of the decorative layer; a pipe is mounted on the waterproof base plate; a penetrating hole corresponding to the pipe is formed in the supporting keel; communicated grooves are formed between the supporting keel and the retaining side; a water catchment hopper communicated with the grooves and a penetrating bushing vertically penetrating the waterproof base plate are arranged on the waterproof base plate respectively; the periphery of the water catchment hopper and the periphery of the penetrating bushing are both in sealed connection with the waterproof base plate. The waterproof undercarriage for the bathroom has the advantages that the design is scientific, modular production is achieved, mounting and maintenance are convenient, and the quality is guaranteed.
Owner:王凤蕊

Construction method for small-clear-distance four-lane shallow-buried large-span tunnel

The invention discloses a construction method for a small-clear-distance four-lane shallow-buried large-span tunnel. The construction method comprises the steps: step S10, alternately constructing two tunnels along the longitudinal direction, wherein the alternating distance is not less than 40 m, performing the look-ahead hole long roof pipe, look-ahead grouting small guide pipe and hollow grouting anchor rod operations, grouting the surrounding rock so as to form the composite lining supporting structure; step S20, excavating and supporting the upper half section of the side pilot tunnel; step S30, excavating and supporting the lower half section of the side pilot tunnel, and performing the formworking secondary lining to the side pilot tunnel; step S40, excavating and supporting the upper half section of the intermediate hole chamber; step S50, excavating and supporting the lower half section of the intermediate hole chamber, and performing the formworking secondary lining to the intermediate hole chamber; and step S60, paving the road surface and decorating the wall. The construction method for the small-clear-distance four-lane shallow-buried large-span tunnel is applied for underground-excavating the separated two-hole tunnel in double directions in the V-level surrounding rock with seriously broken rock bodies, satisfying the tunnel construction safety, reducing the construction risk, improving the construction efficiency, and saving the construction period.
Owner:SHENZHEN MUNICIPAL DESIGN & RES INST

Waterproof key structure and mobile phone using same

The invention relates to a waterproof key structure which comprises a shell, a key switch, a flexible material part and a key. The key switch and the key are assembled on the shell in a position corresponding mode. The key is movably assembled on the shell. The flexible material part is installed on the key in a sleeved mode and pasted on the shell. When pressed, the key can abut against the key switch. A rigid supporting layer is arranged on one face of the flexible material part and pasted on the shell. The key extrudes the flexible material part in the pressing direction until the flexible material part deforms to be assembled together with the shell. In the structure, a rigid support is additionally arranged on foam and used for improving the assembling and locating performance; meanwhile, in the key assembling process, the flexible material part is pressed in advance so as to be in a compressed deformation state after being assembled, and therefore the good waterproof performance of the portion between the flexible material part and the shell is achieved; in addition, when the key is pressed, the direction of pressure is perpendicular to the pasting face of the flexible material part, and therefore the flexible material part can be prevented from slipping or falling from the shell, and the problem that the key is out of work can be avoided.
Owner:POWER IDEA TECH (SHENZHEN) CO LTD

Circuit module and electric vehicle including the same

A circuit board is accommodated in an internal space of a main body casing, and a bus bar electrically connected to the circuit board is drawn out of the main body casing. The bus bar is held in an internal region of a terminal holder positioned outside the main body casing. One end of a harness is connected to the bus bar in the internal region of the terminal holder, and the other end of the harness is drawn out to an external space. In this state, a joint region of a terminal cover is joined to a joint region of the terminal holder.
Owner:SANYO ELECTRIC CO LTD

Seal structure of mobile phone protective shell

The invention belongs to the dustproof, shockproof and waterproof product field and relates to a seal structure of a digital electronic product such a mobile phone, a mobile phone protective shell, a tablet computer, a handheld terminal product, a smart band, a smart watch, a health care electronic product and a smart home electronic product. The seal structure includes a face shell and a bottom shell; the inner side of the frame of the face shell is provided with a plurality of annular grooves, the width of the annular grooves ranging from 0.5 mm to 2 mm; the inner side of the frame of the bottom shell is provided with a plurality of annular projections, the width of the annular projections ranging from 0.6 mm to 2.1 mm; and the plurality of annular projections of the frame of the bottom shell are engaged with the plurality of annular grooves of the frame of the face shell in a staggered manner. The plurality of annular projections of the frame of the bottom shell are embedded into the plurality of annular grooves of the frame of the face shell, so that a reliable protection function can be realized, and the protection level can achieve IP67, any waterproof rubber gaskets are not required. The seal structure has the advantages of low production cost and high efficiency. With the seal structure adopted, a mobile phone product can be designed into a fashion, light and slim product.
Owner:SHENZHEN XIN KINGBRAND TECH DEV CO LTD

Side key protective device of electronic equipment

The embodiment of the invention provides a side key protective device of electronic equipment. The side key protective device of the electronic equipment comprises side key silica gel and metal strips; the side key silica gel comprises a silica gel body and a silica gel edge which is perpendicular to the silica gel body; the metal strips are located on the silica gel edge to fix and tightly press the silica gel edge. The side key protective device can prevent water and dust, and assembly is easy and convenient.
Owner:DATANG TERMINAL TECH

Push switch and method of manufacturing the same

The invention provides a push switch, which can improve water-proof performance of a push switch and production efficiency. The push switch comprises: a button (10) made of a flexible material having a cap shaped top operation part (11), a flat part (14) formed extending laterally from an edge of an opening in the top operation part (11), and a side wall (15) formed extending downward from an outer edge of the flat part; a switch substrate (20) fitted in close contact with the inner circumference of the side wall and abutting the bottom face (14B) of the flat part (14) of the button (10); and a switch arranged inside the button, on the switch substrate, wherein the outer circumferential face of the side wall (15) of the button (10) and the bottom face (20A) of the switch substrate are covered by integrally molded resin.
Owner:TOKYO PARTS IND CO LTD

Waterproof machine shell for water controller

The invention discloses a waterproof machine shell for a water controller. The shell comprises an upper shell and a lower shell which are buckled hermetically and mutually, wherein a positive spigot is formed on the inner wall of a lower port of the upper shell, a negative spigot which is in close fit with the positive spigot is formed on the inner wall of an upper port of the lower shell; dubbin is coated on a matching surface of the negative spigot and the positive spigot; the periphery of the lower port of the upper shell and the upper port of the lower shell, which is closely adjacent to the positive spigot and the negative spigot, is respectively provided with grooves for embedding and clamping sealing members; an upward flange is arranged at the periphery of the groove of the upper port of the lower shell; a glue groove is formed by the flange and the outer wall of the lower port of the upper shell; and sealant is filled into the glue groove. A triple waterproof structure of spigot sealing, sealing member sealing and sealant-pouring sealing at an outer seam of the upper shell and the lower shell is adopted; and compared with a sealing mode of arranging a seal ring in a single groove in the prior art, the waterproof machine shell has the advantages of more reliable and stable water prevention and vapor prevention and excellent heat dissipation, and overcomes the defect of overburning a circuit board due to local overheating.
Owner:NEWCAPEC ELECTRONICS CO LTD

Daylight illumination device pier base and manufacturing method thereof

The invention discloses a daylight illumination device pier base. The pier base is integrally formed on a top board of an underground building by being poured with reinforced concrete, the pier base extends upwards and vertically from the top board, and a through hole for penetrating through the pier base and the top board is formed in the pier base. The through hole is a round hole, and a hollow cylindrical permanent inner mold used for casting the pier base is reserved on the inner wall of the round hole. The permanent inner mold extends to the bottom end of the top board from the pier base, and therefore the part of the permanent inner mold is also formed in the thickness of the top board. The invention further discloses a manufacturing method of the pier base. According to the technical scheme, an original inner mold can be removed, construction is simple, the pier base is waterproof and reliable, and the hidden danger of water seepage due to punching of the top board of a basement is effectively avoided.
Owner:LONGYUAN CONSTR GROUP

Push switch and method of manufacturing the same

A push switch comprising: a button made of a flexible material having a cap shaped top operation part, a flat part formed extending laterally from an edge of an opening in the top operation part, and a side wall formed extending downward from an outer edge of the flat part; a switch substrate fitted in close contact with the inner circumference of the side wall and abutting the bottom face of the flat part of the button; and a switch arranged inside the button, on the switch substrate, wherein the outer circumferential face of the side wall of the button and the bottom face of the switch substrate are covered by integrally molded resin.
Owner:TOKYO PARTS IND CO LTD

Special telescopic device for isolated bridge

InactiveCN106835969ASolve the technical problems that cannot meet the displacement needs of bridges under earthquake actionReasonable structureBridge structural detailsControl systemEngineering
The invention discloses a special telescopic device for an isolated bridge. The special telescopic device comprises side beam steel and N pieces of middle beam steel positioned between two pieces of side beam steel; a V-shaped sealing rubber tape is connected between the middle beam steel and the middle beam steel or between the middle beam steel and the side beam steel; the side beam steel is fixedly arranged on bridge bodies at two sides of a telescopic seam through cast-in-place concrete and an anchoring rib; the telescopic device further comprises M groups of supporting limiting control systems which are uniformly distributed and mounted at the two sides of the telescopic beam; the supporting limiting control systems are the same in structure; each supporting limiting control system comprises a supporting mechanism, a displacement control mechanism and a limiting mechanism which are sequentially installed; each supporting mechanism provides large-angle displacement for the telescopic device; each displacement control mechanism controls uniformity of displacement of the telescopic device; and each limiting mechanism prevents an accident when extension and retraction is excessive. The special telescopic device is reasonable in structure, and enables a vehicle to stably pass and transmits vehicle load to a beam body through the supporting mechanisms; super-large transverse displacement, vertical displacement, vertical steering and horizontal steering can be realized, and deformation needs, under earthquake action, of the bridge are met.
Owner:柳州东方工程橡胶制品有限公司

Toilet base plate

The invention provides a toilet base plate. The base plate comprises a base plate body, a floor drain is connected to the base plate body and matched with the base plate body, a floor drain water outlet in the floor drain is formed in the side edge of the base plate, a floor drain water inlet is formed in the base plate body, and the floor drain water inlet is in communication with the floor drain water outlet; a first waterproof flange is arranged on the side edge of the base plate and connected to the base plate in a sealed mode; and the base plate is divided into a wet area base plate and a dry area base plate, transportation and installation are convenient, a water guide groove is further formed in the wet area base plate, and a drainage slope is arranged in the water guide groove. According to the toilet base plate, the tightly connected waterproof flanges are arranged on the side edges of the base plate to form a waterproof frame, then the waterproof purpose is achieved, the floor drain drain water outlet is formed in the side edge of the base plate, the height of the base plate body is reduced, water is drained from the side face, the integrity of the bottom face of the base plate body is guaranteed, and water resistance is facilitated; and the base plate is convenient to process, flexible in size, convenient to install and wide in application range, and is worthy of popularization and use.
Owner:上海红点卫浴科技有限公司

Manufacturing method for in-mold injection 3D coil product and 3D coil product

A manufacturing method for an in-mold injection 3D coil product comprises the following steps that a, a metal material is machined to form a 3D coil, the overall contour of the 3D coil is in a pot shape, and multiple circles of wires of the 3D coil are distributed in a surrounding mode; b, an injection molding piece is formed on one side of the 3D coil through integrated injection molding; and c, secondary injection molding is conducted on the 3D coil to cover the 3D coil, and only two contacts of the positive pole and the negative pole of the coil are exposed. The in-mold injection 3D coil product comprises the 3D coil with the overall contour being in the pot shape and the multiple circles of wires distributed in the surrounding mode and the injection molding material part which is integrally formed with the 3D coil through injection molding, the injection molding material part wraps the 3D coil, and only the two contacts of the positive pole and the negative pole of the 3D coil are exposed. The effective heating area of the 3D coil product is large, efficiency is high, and heating is even.
Owner:GUANGDONG JANUS SMART GRP CO LTD +1

Novel automatic aligning roller of belt conveyer

The invention discloses a novel automatic aligning roller of a belt conveyer, which comprises two rubber rollers (1), a rubber sleeve (2) and a wabbler mechanism (3), wherein the two robber rollers (1) are symmetrically arranged on the left and on the right, the wabble mechanism (3) is positioned between the two rubber rollers; and the wabbler mechanism (3) consists of a screw (31), a bearing cover (32), a sealing ring (33), an antifriction bearing (34), an inner sleeve (35), a center sleeve (36), an outer sleeve (37), a cylindrical pin (38) and a central pendulum shaft (39). In the novel automatic aligning roller, as a key movement mechanism is concentrated in the wabbler mechanism, and due to the action of the seal ring and the rubber sleeve, the dust-proof and the water-proof effects are more reliable. So that the automatic aligning roller can be used in occasions with severe environment; requirements of different specifications of the belt conveyer can be met by only changing the rubber rollers; and the wabbler mechanism is convenient to maintain, replace and organize production.
Owner:HERMAN NANJING TECHN & ENG PTE

Pile head waterproof structure and construction method thereof

The invention discloses a pile head waterproof structure and a construction method thereof. A waterproof roll is laid first, then a post-pouring pile head is formed through pouring, the waterproof roll and the post-pouring pile head are formed into a whole, a buffer rod is arranged at the end of the post-pouring pile head, thus the waterproof roll can settle along with settlement of the post-pouring pile head, the conditions that the waterproof roll is stressed and torn due to settlement of the pile head are avoided, and waterproof integrity and reliability are ensured. A settlement sealing strip is of a special structure, and under extrusion of the post-pouring pile head, inside sealant is extruded continuously to seal the waterproof roll, a foundation pile head and the post-pouring pilehead. In addition, along with settlement of the building, extrusion pressure of the post-pouring pile head becomes large, more sealant in the settlement sealing strip is extruded, thus the waterproofroll and the pile heads are sealed more tightly, water prevention is more reliable, and a virtuous cycle is formed accordingly. The pile head waterproof structure and the construction method thereof provided by the invention are suitable for cast-in-place piles, precast piles, hollow piles and other various pile heads of different models and shapes and are high in practicability.
Owner:SHANGHAI ORIENTAL YUHONG WATERPROOF TECH CO LTD +1
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