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171results about "Sidewalk pavings" patented technology

Railway bridge foot plank made of high-strength light composite material

The invention belongs to the technical field of railway bridge ancillary facilities, and discloses a high-strength light composite material railway bridge foot plank which comprises a plane part at the top and hollow strip-shaped protrusions arranged in the length direction, and strip-shaped grooves opened downwards are formed between the protrusions so as to improve the bearing capacity and reduce the dead weight. The foot plank is formed by combining a resin matrix, an alkali-free glass fiber reinforced material, a flame retardant and an auxiliary agent, an unsaturated polyester resin system or an epoxy resin system is selected, and the connecting piece is of an S-shaped component or a hook type structure, so that rapid installation and reliable locking of the foot plank and the steel beam are achieved. The foot plank has the advantages of high strength, light weight, corrosion resistance, high weather resistance and the like, and is suitable for long-term safe use of railroad bridges.
Owner:GUOHUA YONGSHENG (SHANXI) NEW MATERIALS TECH CO LTD

Ecological diversion retaining dam

The utility model relates to the technical field of water conservancy projects, in particular to an ecological diversion retaining dam which comprises a dam body, the two sides of the dam body are of slope structures, the side, making contact with the water surface, of the dam body is arranged to be an upstream slope, and the other side of the dam body is arranged to be a downstream slope. The concrete base, the ecological filtering layer and the dam-passing stone step are sequentially arranged in an overlapped mode, a plurality of drainage pipelines are arranged in the ecological filtering layer, steel frame strips are arranged between the ecological filtering layer and the dam-passing stone step at equal intervals, an overflow channel is formed in a gap between every two adjacent steel frame strips, and the overflow channels communicate with the upstream slope and the downstream slope correspondingly; a water retaining gate is arranged above the overflow channel and attached to the downstream slope, and one end of the water retaining gate is movably connected with the dam body. According to the utility model, the garden environment is beautified, water can be shunted for use, the utilization rate of water can be effectively improved, and the downstream flood risk can be reduced.
Owner:GUANGDONG FOGAO HLDG CO LTD

Surface structure including a mesh and method of forming the same

A surface structure 2 for an area of hard standing comprises a particulate body 14 formed from a plurality of particulates 16, such as gravel, bonded by a cured resin material. At least one mesh layer
Owner:VUBA CHEMICAL INNOVATIONS LTD

Induction blind sidewalk brick, trigger-type tactile stick and blind sidewalk cooperation system

The invention relates to the technical field of intelligent traffic equipment, in particular to an induction blind sidewalk brick, a trigger type tactile stick and a blind sidewalk cooperation system. The sensing blind sidewalk brick comprises a blind sidewalk brick body and a sensing device, wherein a cavity is formed in the blind sidewalk brick body; the trigger device is arranged on the blind sidewalk brick body and is used for receiving a trigger signal triggered by short-distance wireless induction; the sensing device is arranged in the cavity and is in signal connection with the triggering device, and the sensing device sends out a warning signal after the triggering device receives the triggering signal; wherein the trigger device is a tactile stick trigger device; a trigger signal triggered by short-distance wireless induction is sent out by the tactile stick. According to the tactile stick, a point-to-point identification relation is established through close-range induction (magnetism, metal and radio frequency), and the effect that the brick responds only when a visually impaired person carrying the tactile stick arrives is achieved; the selective triggering suppresses broadcast flooding caused by scene noise (raindrops, footsteps, baby carriages and the like), so that information fatigue and urban noise pollution are avoided.
Owner:BEIJING GENERAL MUNICIPAL ENG DESIGN & RES INST

A garden green plant system of a park under a viaduct and a layout method thereof

The application relates to a garden green plant system of a park under an overpass and a layout method thereof, and belongs to the technical field of garden irrigation. The system comprises a vegetation layer, a water inlet pipeline is arranged on the vegetation layer, a pressure assembly and a spray head are arranged on the water inlet pipeline; the pressure assembly comprises a pressure cylinder, a sealing plug, an elastic piece and a partition plate, the open end of the pressure cylinder is in communication with the inside of the water inlet pipeline, the inside of the pressure cylinder is divided into a sealing cavity and a communication cavity by the partition plate fixed in the pressure cylinder, the communication cavity is located at the communication position of the pressure cylinder and the water inlet pipeline, the sealing plug is slidingly arranged in the communication cavity, the circumferential sidewall of the sealing plug is in sliding abutment with the inner wall of the communication cavity, the elastic piece is located on the side, away from the water inlet pipeline, of the sealing plug, the elastic piece pushes the sealing plug to move close to the water inlet pipeline, a through hole is arranged on the partition plate, and the spray head is in communication with the inside of the sealing cavity; a pressure adjusting assembly for adjusting the posture of the elastic piece is arranged on the pressure cylinder, and the application has the effect of different water quantity irrigation on different types of vegetation.
Owner:BEIJING DONGFANG HUAHUI MUNICIPAL ENG GRP CO LTD

Non-volatile room-temperature modified asphalt binder, non-volatile room-temperature recycled asphalt mixture containing the same, and method for repairing potholes and cracks using the same.

This disclosure relates to a non-volatile room-temperature modified asphalt binder, a non-volatile room-temperature recycled asphalt mixture containing the same, and a method for repairing potholes and cracks using the same. [Solution] A non-volatile, room-temperature recycled asphalt mixture according to one embodiment has the advantages of improved fluidity, prevention of conventional asphalt cracking, improved peeling, and enhanced thermal stability.
Owner:ハンスー ロード インダストリー カンパニー リミテッド

Quick assembly type lawn protection board

The utility model relates to quick assembly type lawn protection board, including the board body, the board body upper end longitudinal interval is equipped with multiple rows of antiskid structure, and each row of antiskid structure includes the multiple antiskid lines A and antiskid lines B that are alternately set in sequence interval, the center of antiskid line A and antiskid line B is equipped with the through -hole respectively, the board body lower extreme longitudinal interval is equipped with multiple rows of openwork support structure, and each row of openwork support structure includes the multiple support rings that are set up in horizontal interval, the board body lower extreme is equipped with the grid reinforcing rib, the board body all around is equipped with the side plate respectively, the side plate and support ring lower extreme flush, openwork support structure and side plate inner wall connect, the outside of adjacent two side plates is respectively equipped with multiple clamping seats on interval, the clamping seat both sides are equipped with the card column respectively, and the inside of corresponding other two side plates is respectively equipped with multiple clamping slots that cooperate with clamping seat and card column and splice. Have the advantages such as reasonable in structure design, strong impact resistance, good antiskid effect, convenient and quick splice.
Owner:BEIJING GUANXING SPORTS FACILITIES CO LTD

Luminous floor tile

The utility model relates to a luminous floor tile which comprises a tile body, the tile body is provided with an installation groove which is arranged in a penetrating mode in the horizontal direction, and a lamp strip is installed in the installation groove in a penetrating mode. The base is attached to the bottom of the brick body in the vertical direction, a wire passing groove is formed in one side of the base, the wire passing groove is connected with the tail end of the mounting groove, and a lead connected with the lamp strip is mounted in the wire passing groove; the adhesive tape layer wraps and is attached to the periphery of the tile body and the periphery of the base in the vertical direction, the adhesive tape layer is made of an elastic material, and the adhesive tape layer is used for filling a gap between the light-emitting floor tile and the ground after the light-emitting floor tile is installed in the ground. By means of the brick body and the base which are arranged in an attached mode, higher bearing strength is achieved, the adhesive tape layer wraps the periphery of the brick body and the base, the integrating degree of the brick body and the ground is high, and material decay and structure looseness caused by rainwater permeation are avoided.
Owner:SUZHOU DISHU NEW MATERIAL TECH CO LTD

Garden water-saving road

The garden water-saving road comprises a roadbed and drainage pipelines arranged on the two sides of the roadbed, sewage intercepting structures are arranged on the drainage pipelines, a collecting channel is arranged on one side in each drainage pipeline, and each sewage intercepting structure comprises a sewage intercepting net between the corresponding drainage pipeline and the corresponding collecting pipeline and a drainage cover plate arranged on the corresponding drainage pipeline. Filtering holes are formed in the sewage intercepting net at intervals, and the aperture of the filtering holes, close to the drainage pipeline, below the sewage intercepting net is smaller than that of the filtering holes above the sewage intercepting net; water taking holes are formed in the collecting channel at intervals. Water entering the collecting channel is filtered in a classified mode through the sewage intercepting net with different hole diameters, silt and the like deposited at the bottom of the drainage channel are further intercepted through the filtering holes with the small hole diameters, the impurity removal effect on the water flowing into the drainage channel is improved, the water quality is improved so that the water can be recycled for garden irrigation and the like, and water saving is facilitated; when the abutting plate rotates to be staggered with the drainage cover plate, the drainage cover plate can be conveniently opened to clean silt and the like deposited in the drainage channel, and operation is more convenient.
Owner:WENZHOU HUAHONG MUNICIPAL GARDEN ENG CONSTR CO LTD

A pedestrian-resistant organic mulch roadway and method of making same

ActiveCN117738041BImprove tread resistanceStrong resistance to tramplingLiquid surface applicatorsPaving gutters/kerbsSoil scienceEngineering
The application discloses a kind of tread-resistant organic covering garden roads and its manufacturing method, by composite organic covering layer, leveling layer, cushion layer, waterproof layer, waterproof protective layer and drainage ditch composition;The prepared organic covering garden road has higher compactness and tread-resistant ability, increases the mildew-proof, fireproof, windproof ability of organic covering garden road, greatly improves the service life and safety of organic covering garden road, also has the effect of keeping moisture, adsorbing dust, adjusting soil temperature, increasing soil fertility, inhibiting weeds, promoting planting growth, reducing soil erosion and decoration beauty etc.
Owner:SHANGHAI CHENSHAN BOTANICAL GARDEN

Single-component road adhesive based on polyurea asphalt technology and preparation method thereof

The invention belongs to the field of high polymer materials and road engineering materials, and provides a single-component road adhesive based on a polyurea asphalt technology and a preparation method of the single-component road adhesive. The adhesive is prepared by compounding an isocyanate-terminated prepolymer and macromolecular asphaltic acid, wherein the prepolymer is prepared by reacting diisocyanate with polycarbonate diol, and carrying out amine chain extension and silane end group modification; the macromolecular asphaltic acid is prepared by reacting maleic anhydride of asphalt with polyoxypropylene diamine and carrying out silane anchoring. The control parameters of the system are as follows: the equivalence ratio is 1.5-8.0, the isocyanate content is 4.0-10.0 wt%, and the viscosity is 10-80 Pa.s. The high-solid-content low-viscosity processing is realized, the bonding strength to a wet base material is 0.80-1.50 MPa, the adhesive has cracking resistance, flame retardance, heat resistance and yellowing resistance, and the problem that constructability, interface anchoring and durability of a traditional adhesive for roads are difficult to consider is solved. The method is suitable for the fields of road paving, crack sealing, water resistance, corrosion resistance and the like.
Owner:JIANGSU JIAJING ECOLOGICAL ENG TECH CO LTD

Anti-aging noctilucent pavement permeable floor tile and preparation method thereof

The invention discloses an anti-aging noctilucent pavement permeable floor tile and a preparation method thereof. The floor tile sequentially comprises a noctilucent functional layer, a cementing layer and a cement-based water permeable tile body layer from top to bottom, the noctilucent functional layer is formed by mixing and curing granular solids, light-transmitting powder, a noctilucent material and a polyaspartic acid ester resin A / B system, and the component B contains an anti-settling agent, a wetting agent, an adhesion promoter, a thickening agent, a coalescing agent and isocyanate. The cementing layer and the noctilucent functional layer are in the same system, the thickness and dosage are controlled, preferably, the noctilucent layer is 5-15 mm, and the bottom layer is larger than or equal to 20 mm. The ratio of the noctilucent layer is (70-80): (0-5): (5-15): (6-12), and the mass ratio of the component B is 3: (1-4): (2-3): 1: 2: 50; the process comprises the following steps of: paving within 30 minutes after painting a cementing layer of the same system, and flattening by using a steel roller. According to the structure, the yellowing resistance and the luminescence uniformity are improved while the water permeability and the wear resistance are maintained.
Owner:SHANGHAI PUDONG ROAD & BRIDGE GRP CO LTD

Narrow Space Personal Transportation System

The personal transportation system includes a plurality of personal transportation vehicles (PTVs) traveling on a track network having a series of track sections. The PTV's main section has a width adapted to accommodate a single occupant. The PTV drive mechanism propels the PTV and includes track-engaging elements that protrude downward from the main section and have a narrow width that makes the main section prone to tipping when the PTV is stationary. The space between the width of the main section and the track-engaging elements can be occupied by public infrastructure. Each track section includes a ground portion minimally adapted to accommodate the width of the track-engaging elements and a clear space above the ground portion minimally adapted to accommodate the width of the main section that is free of non-transient obstacles. The guidance mechanism guides the PTV along the track network and prevents the PTV from deviating from the track section. The stabilization mechanism stabilizes the PTV along the track network and prevents the PTV from tipping over when turning, merging, or branching.
Owner:NATIVONIM LTD

Modular platform deck for traffic

A modular assembly and method of installing a modular assembly is provided. The modular assembly can include a plurality of base members made of a composite material. Each base member can be a monolithic structure, and define a channel. A heater tray can be configured to be slidably received within the base member. Each of the plurality of base members can adjoin one another in an assembled state to form a horizontal platform for traffic.
Owner:ASTRA CAPITAL

Buckle type trestle road plate mounting system

The utility model discloses a buckle style plank road board installation system relates to plank road board technical field, including plank road board main part and buckle piece, the both sides of plank road board main part are provided with the clamping groove, the two adjacent plank road board main part is through the buckle piece fixed buckle connection, the both sides of plank road board main part are provided with the adjusting chute, the both sides of plank road board main part are provided with the buckle piece fixed buckle connection, the buckle piece fixed buckle connection between the plank road board main part and the buckle piece fixed buckle connection between the plank road board main part and the buckle piece fixed buckle connection between the plank road board main part. A communicating groove is formed in the groove bottom of the adjusting sliding groove, a mounting groove is formed in the groove bottom of the communicating groove, and a locking mechanism used for locking the buckle piece is mounted in the mounting groove; according to the plank road plate, the buckling pieces are matched with the clamping grooves of the plank road plate main bodies, and the locking mechanism has an automatic locking function, so that the plank road plate main bodies are quickly mounted and dismounted, and the construction efficiency and the maintenance convenience are greatly improved.
Owner:YICHUN JINTE BUILDING MATERIAL IND CO LTD

A sponge structure and method for expanding the root zone growth space of a street tree

The application discloses a sponge structure and method for expanding sidewalk tree root growth space, and the sponge structure comprises a permeation layer, a soil improvement layer, a water storage adjusting mechanism and an evaporation reduction structure, the soil improvement layer is used for filling original soil excavated on a sidewalk, the soil improvement layer is made by mixing gravel, waste wood and planting soil, and the sponge structure construction method comprises the steps of prefabricating a cement groove, pre-burying a water pipe, adjusting soil, preventing evaporation and laying the permeation layer. The soil is improved, the soil nutrition is improved, the soil is spongy, the water retention and storage performance of the soil is improved, the underground root growth space structure of the sidewalk tree is adjusted, the sidewalk tree and urban green land are connected, the sidewalk tree is really integrated into the green land, the urban heat island and waterlogging problems are solved, urban rainwater is utilized, the sidewalk tree grows healthily, and the ecological benefits of the tree are increased, and finally, the sponge city and the organicization of hard urban space are achieved.
Owner:SHANGHAI CHENSHAN BOTANICAL GARDEN

Dry and wet partitioned prefabricated ecological patrolling footpath system and prefabricating and monitoring method thereof

The invention relates to a dry and wet partitioned prefabricated ecological patrolling footpath system and a prefabricating and monitoring method thereof, and belongs to the technical field of constructional engineering and electric power facility safety. Each footpath unit is integrally prefabricated and formed by high-resistance concrete, the cross section of each footpath unit is of a functional space three-dimensional partition structure, planting areas on the two sides are wet areas, a walking area in the middle and a structural equipment cavity below the walking area are dry areas, and the three areas are permanently isolated through longitudinal and transverse beam grid-shaped concrete shear walls. During prefabrication in a factory, an integrated reinforcing mesh is bound firstly, then a drawable inner mold is placed, high-resistance concrete is poured, a gravel drainage layer and geotechnical cloth are laid in a planting area after demolding, and load bearing, ecology and monitoring function decoupling is achieved. According to the structure health monitoring method, MEMS inclination angle and temperature and humidity sensors are arranged at stress key points of the cavity, data are uploaded to a cloud platform through a solar LoRa gateway, and predictive maintenance is achieved.
Owner:POWERCHINA FUJIAN ELECTRIC POWER SURVEY & DESIGN INST CO LTD

Novel cantilever platform structure based on lever principle

The utility model discloses a novel cantilever platform structure based on the lever principle. The novel cantilever platform structure comprises a groove type empty box structure and a rod straining beam plate structure. The groove type empty box structure serves as a basic supporting structure of the whole cantilever platform system, the top of the groove type empty box structure is fixedly connected with the rod system beam plate structure, the rod system beam plate structure extends by a certain length on the two sides of the groove type empty box structure, and the lower portion of the inner side end of the rod system beam plate structure is fixedly connected with a ballasting block to form a ballasting structure and a cantilever structure. The outer edge of a lower foundation of the groove type empty box structure serves as a fulcrum of the whole cantilever platform structure, the dead weight and upper loads of the cantilever platform form power torque, the saddle weight and upper loads of the saddle weight form resistance torque, and the outer side of the rod system beam plate structure extends out of the corbel structure to serve as a supporting arm of the cantilever platform structure. According to the utility model, the splicing width of the platform can be flexibly controlled, and a convenient traffic system in which people and vehicles are separated is formed.
Owner:ZHEJIANG DESIGN INST OF WATER CONSERVANCY & HYDROELECTRIC POWER

Tunnel maintenance path RPC cover plate and preparation method and application thereof

The invention provides a tunnel maintenance path RPC cover plate and a preparation method and application thereof, and relates to the technical field of highway and municipal tunnel engineering, the RPC cover plate matrix comprises the following components by weight: 750-850 parts of cement, 110-220 parts of fly ash, 120-220 parts of silica fume, 1000-1200 parts of fine aggregate, 10-80 parts of an additive, 130-160 parts of water, and 80-120 parts of fiber; the fibers comprise short-end hook steel fibers and polypropylene fibers; the mass ratio of the short-end hook steel fibers in the matrix is 0.6%-2%, and the mass ratio of the polypropylene fibers in the matrix is 0.1%-0.2%. The RPC cover plate for the tunnel maintenance road has the characteristics of high strength, high durability and small thickness, and is high in fracture resistance, low in manufacturing cost, easier to shape and attractive in appearance.
Owner:浙江顺畅高等级公路养护有限公司 +1

A water-permeable structural surface layer arched brick

This utility model discloses a permeable arched brick surface layer, comprising a compacted soil base layer, an impermeable membrane on the upper surface of the compacted soil base layer, a first crushed stone layer on the upper surface of the impermeable membrane, a second crushed stone layer on the upper surface of the first crushed stone layer, a third crushed stone layer on the upper surface of the second crushed stone layer, and an arched brick structure on the upper surface of the third crushed stone layer. The arched brick structure is made of concrete, reducing costs while possessing high strength. Protrusions and grooves are provided on the sidewalls of the arched bricks, arranged in a staggered pattern, specifically horizontally spaced to form permeable brick joints that accelerate rainwater runoff. This design is suitable for permeable paving in sponge city construction, reducing project costs. The brick structure accelerates rainwater infiltration, and the inclusion of the crushed stone layer and impermeable membrane enhances the rainwater storage capacity of the sponge city. After installation, the surface is highly flat, aesthetically pleasing, and durable.
Owner:SHENYANG MUNICIPAL ENG DESIGN RES INST

Technological method for preparing sintered pavement brick through low-temperature slow firing

The invention discloses a process method for preparing sintered pavement bricks by low-temperature slow firing, which is characterized in that mill tailings and clay auxiliary materials are used as main raw materials, the main components of the tailings are quartz and feldspar, the content of the feldspar is not less than 30%, and the auxiliary materials contain at least one clay mineral of kaolinite, chlorite and montmorillonite; mixing the tailings and auxiliary materials according to the weight ratio of (6: 4)-(9: 1), and adding water and a fluxing agent to obtain a mixture, wherein the fluxing agent is selected from industrial solid wastes such as boric sludge, lithium slag or spodumene tailings; pressing and forming the mixture to obtain a green body, drying the green body to constant weight, finally sintering by adopting a low-temperature slow sintering process, controlling the sintering temperature at 900-1000 DEG C, and cooling along with a furnace after heating and heat preservation stages to obtain a finished product. According to the invention, industrial solid waste is used as a raw material, and the sintered pavement brick with the compressive strength reaching the standard is prepared while the energy consumption is reduced through an optimized raw material ratio and a low-temperature sintering process, so that the unification of solid waste recycling, energy conservation and consumption reduction and high performance of a product is realized.
Owner:JIXI CITY PU CHENG GRAPHITE CO LTD +1

Sidewalk interlocking block

The utility model provides a sidewalk interlocking block which comprises a body, and a plurality of supporting structures abut against the edge of the side surface of the body. A plurality of drainage pipelines are arranged in the body; the supporting structure comprises a partition plate, and the partition plate abuts against the side surface of the body. The partition plate and the body are provided with a water retaining structure which is communicated with the bottom of the body and the surface of the body; the water retaining structure comprises a plurality of concave surfaces and convex surfaces which are communicated with one another; a plurality of positioning cones are arranged at the bottom of the body, and each drainage pipeline penetrates through the body and the positioning cones. The side edge of the interlocking block is designed into a concave surface and convex surface structure, so that accumulated water flows along the contacted surface structure due to the surface tension effect of liquid when being ejected from bottom to top, and certain kinetic energy is consumed by the accumulated water before the accumulated water is ejected out due to the effect of the concave surface and the convex surface; and accumulated water on the surface of the interlocking block can be quickly emptied through a one-way drainage pipeline.
Owner:SHAANXI WEST IRON CEMENT PROD CO LTD

Modular structure of sponge city green landscape road

The application discloses a sponge city greening landscape road with a modular structure and relates to the technical field of landscape roads.The sponge city greening landscape road comprises a top plate, the outer wall of the top plate is fixedly connected with protrusions, the protrusions are provided in three, the bottom of each protrusion is fixedly connected with a first limiting rod, the outer wall of the top plate is fixedly connected with clamping grooves, the clamping grooves are provided in three, a bottom plate is arranged below the top plate, the width of the bottom plate is greater than that of the top plate, a first through hole is arranged on the bottom plate, a plurality of first through holes are provided, a first flower stand is arranged above the bottom plate, two first flower stands are provided, the outer wall of the bottom plate is fixedly connected with a positioning mechanism, the positioning mechanism comprises positioning grooves and positioning rods, the positioning grooves are fixedly connected with the first flower stands, a plurality of positioning grooves are provided, clamping plates are fixedly connected to the inner wall of each positioning groove, a plurality of clamping plates are provided, and positioning holes are arranged on the inner wall of each positioning groove.The sponge city greening landscape road has the advantages that the ponding of the road can be conveniently solved, a broken road surface can be conveniently replaced, and the efficiency of repairing the road surface is improved.
Owner:SUYI DESIGN GRP CO LTD

Smart Modular Street and Sidewalk

A modular system for streets formed of a top module, a bottom module, an internal cavity formed within the bottom module,cables positioned within said bottom module, a computing device,sensors operatively associated with said computing device, andcommunications hardware configured to communicate information from said sensors to a second computing device positioned exterior to said modular system.
Owner:SIMOVICH GUILLERMO DAVID

Intelligent blind sidewalk information prompting brick

The invention relates to an intelligent blind sidewalk information prompting brick which comprises a brick body and a rear cover, a mounting cavity and a mounting groove which are communicated are formed in the lower side face of the brick body, a penetrating through hole is formed in the brick body in the vertical direction, the through hole is communicated with the mounting groove, and the rear cover hermetically covers the mounting cavity and the mounting groove; the microwave transceiving assembly comprises a matrix antenna information point, a PCB antenna and a matrix antenna feeder, the matrix antenna information point is arranged on the upper side face of the brick body and located on the upper side of the through hole, the matrix antenna feeder is located in the mounting groove, one end of the PCB antenna is electrically connected with the matrix antenna feeder, and the other end of the PCB antenna penetrates through and is electrically connected with the matrix antenna information point; the information processing assembly is fixedly arranged in the mounting cavity, and the information processing assembly is electrically connected with the matrix antenna feeder; the energy storage power supply is fixedly arranged in the mounting cavity, and the energy storage power supply is electrically connected with the microwave transceiving assembly and the information processing assembly, so that accurate positioning and efficient guiding are realized.
Owner:YANCHENG RONGLI NEW BUILDING MATERIAL