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51results about How to "Guarantee construction efficiency" patented technology

Cloud manufacture capacity service modeling method based on meta-model

ActiveCN103150623AValid conversionEnsuring Competency Knowledge AcquisitionResourcesModel descriptionComputer science
The invention relates to a cloud manufacture capacity service modeling method based on a meta-model. The method comprises the following steps: (1) constructing a system achieving the method, enabling the system to comprise a manufacture capacity service meta-model description module, an interactive type manufacture capacity service description expansion module and a manufacture capacity service script file generating module; (2) enabling the manufacture capacity service meta-model description module to abstract the manufacture capacity service meta-model; (3) enabling the interactive type manufacture capacity service description expansion module to expand and perfect various contents of the manufacture capacity service meta-model; and (4) enabling the manufacture capacity service script file generating module to generate a service description script file which can be processed by a cloud manufacture serve engine. According to the cloud manufacture capacity service modeling method based on the meta-model, the service description script file which can be processed by the cloud manufacture service engine can be fast and effectively produced through conversion, and efficiency of capacity knowledge acquisition and model construction is ensured.
Owner:BEIJING SIMULATION CENT

Reinforced concrete combination column structure and simultaneous pouring construction method

PendingCN106884502AIncreased shear strengthHigh structural construction efficiencyStrutsPillarsReinforced concreteArchitectural engineering
The invention relates to a reinforced concrete combination column structure which mainly comprises an upper steel tube column, a lower steel tube column, a lining tube, connecting ring plates and a vertical connecting screw; the upper steel tube column and the lower steel tube column are connected through the lining tube, concrete air vents and concrete pouring holes are formed in the surface of the steel tube columns, the connecting ring plates are arranged on the upper steel tube column and the lower steel tube column, the connecting ring plates are put on a cross-shaped rod and are anchored through horizontal screws on ring plate connecting end plates, and are horizontally clamped through U-shaped fastening brackets connected in series on the cross-shaped rod; the upper connecting ring plate and the lower connecting ring plate are connected through the vertical connecting screw, the vertical connecting screw and the upper connecting ring plate and the lower connecting ring plate are anchored by adopting screw caps, and a regulating and positioning top support is arranged on the end of the vertical connecting screw; and beam-column reinforcements are bound at the outer peripheries of the steel tube columns and templates are erected at the outer peripheries of the steel tube columns. According to the reinforced concrete combination column structure, the connecting node of the upper steel tube column and the lower steel tube column has strong anti-shearing performance, all members are simply and conveniently assembled, and the technical and economic benefits are prominent.
Owner:SHENZHEN FUTIAN JIANAN CONSTR GRP

Amplitude separation and reverse support replacement construction method for open-excavated single-layer twin-bore or multi-bore tunnel

ActiveCN108612128ASolving Safe Demolition IssuesReasonable process stress conversionArtificial islandsExcavationsStructure of the EarthMono layer
The invention discloses an amplitude separation and reverse support replacement construction method for an open-excavated single-layer twin-bore or multi-bore tunnel. For a twin-bore (multi-bore) single-layer underground road structure, the structure is free of amplitude separation, stage construction is carried out according to an open excavation and ordinal construction method and is completed in the manners of stage excavation of a foundation pit and stage implementation of the structure, the influence on current traffic is reduced, and the site space and project cost are reduced. A middle-row support structure is arranged at a stage excavation interface of the foundation pit, and reverse support replacement from top to bottom is carried out on the middle-row support structure when thefoundation pit is excavated in the later period, so that water and soil pressure of the outer side wall of the foundation pit excavated in the later period is safely transferred to a middle wall and aslant throwing support, and the middle-row support structure is removed after safe unloading is achieved. By means of the method, the technical problems of traffic reconciliation difficulties, site deficiency and the like during construction of underground roads under the condition of narrow sites in a city can be solved.
Owner:BEIJING GENERAL MUNICIPAL ENG DESIGN & RES INST

Building engineering quantity analysis and management method and system based on BIM technology, and computer storage medium

ActiveCN113343342APrecise optimization of construction periodImprove scienceGeometric CADForecasting3d imageConstruction engineering
The invention discloses a building engineering quantity analysis and management method and system based on a BIM technology, and a computer storage medium. The building engineering quantity analysis and management method based on the BIM technology comprises the following steps: constructing an original building engineering BIM model; carrying out model division on the original building engineering B I model; obtaining basic information corresponding to each original building sub-model; performing three-dimensional image acquisition on the constructed area of the constructional engineering; obtaining basic construction information corresponding to the constructed area of the building engineering; constructing a BIM model of the constructed area; matching and comparing the original building sub-models of the building engineering with the BIM model of the constructed area; optimizing the construction period corresponding to the to-be-constructed area of the building; therefore, the problem that the sharing, visualization and adjustability of the building engineering information cannot be realized by the existing building engineering quantity analysis and management method is effectively solved, and the smoothness of the building engineering construction process is greatly improved at the same time.
Owner:贵州百胜数源工程技术管理有限公司

RA resin asphalt spreader and cleaning device thereof

The invention discloses an RA resin asphalt spreader. The RA resin asphalt spreader comprises a walking vehicle, wherein a control cabinet, an engine, an air compressor, a resin asphalt stirring tank and a conveying pump are arranged on the upper surface of the walking vehicle in sequence from right to left; a lifter is arranged at the leftmost end of the walking vehicle; a row of nozzles is mounted on the lifter; an electric generator is electrically connected with the air compressor; pneumatic valves are arranged on the upper surfaces of the nozzles; the air compressor is connected with the pneumatic valves through pipelines; an output port of the resin asphalt stirring tank is connected with the conveying pump through a pipe; and a flow meter and a pressure sensor are arranged between the conveying pump and the nozzles. The spreader brushes RA resin asphalt with uniformity and high efficiency. The invention further discloses a spreader cleaning device convenient for cleaning the RA resin asphalt spreader.
Owner:GUANGDONG PROVINCIAL CHANGDA HIGHWAY ENG

Intelligent manufacturing method for LNG ship double-layer bottom subsections

The invention discloses an intelligent manufacturing method for LNG ship double-layer bottom subsections. The method specifically comprises the following steps: manufacturing an inner bottom plate middle assemblage, an outer plate secondary middle assemblage, a second longitudinal girder small assemblage, a first rib plate small assemblage, a third longitudinal girder small assemblage, a simple small assemblage, a second rib plate small assemblage and a longitudinal girder combined small assemblage; assembling the second rib plate small assemblage and the third longitudinal girder small assemblage together to generate a first longitudinal girder small assemblage; arranging a first small longitudinal girder assembly, a second small longitudinal girder assembly, a first small rib plate assembly, a simple small assembly and a small longitudinal girder assembly on the secondary middle assembly of the outer plate to form a middle assembly of the outer bottom plate; and folding the outer bottom plate middle assemblage and the inner bottom plate middle assemblage into a double-layer bottom subsection. According to the method, all intermediate products can be effectively managed, the turnover rate of a site can be increased, product overstock is reduced, and the construction quality and the construction efficiency of the double-layer bottom subsection are guaranteed.
Owner:HUDONG ZHONGHUA SHIPBUILDINGGROUP

Ship robot moving portal provided with gear meshing clearance elimination mechanism

The invention relates to the technical field of shipbuilding, and particularly discloses a ship robot moving portal provided with a gear meshing clearance elimination mechanism. The portal comprises two ground rails, first longitudinal traveling mechanisms, second longitudinal traveling mechanisms, a cross beam mechanism and a traveling trolley; the two ground rails are parallel with each other; the first longitudinal traveling mechanisms and the second longitudinal traveling mechanisms correspond to the two ground rails respectively; the two ends of the cross beam mechanism are fixedly connected with the first longitudinal traveling mechanisms and the second longitudinal traveling mechanisms respectively; a linear guiding rail is arranged on the cross beam mechanism; the traveling trolleyis arranged on the linear guiding rail; the first longitudinal traveling mechanisms and the second longitudinal traveling mechanisms are provided with bottom traveling drives; the bottom traveling drives are mounted through clearance elimination devices; each bottom traveling drive comprises a motor and a gear; racks are arranged on the ground rails and mesh with the gears; and the traveling trolley is provided with a cross beam traveling drive and moves along the linear guiding rail.
Owner:ZHONGCHUAN NO 9 DESIGN & RES INST

Trial paving device for stone paving and stone paving method

The invention discloses a trial paving device for stone paving and a stone paving method, and relates to the technical field of stone paving. The trial paving device can utilize a clamping mechanism to lift or release a template. The stone paving method comprises the steps of (1) placing a template on a bonding layer in a virtual paving state by using a clamping mechanism, and hammering the template so as to enable the bonding layer in the virtual paving state to be compacted and flattened by the template; (2) lifting the template by using the clamping mechanism, continuously paving a bondinglayer in a virtual paving state on the bonding layer compacted and flattened by the template, placing the template on a new bonding layer in the virtual paving state by using the clamping mechanism, and hammering the template so as to enable the new bonding layer in the virtual paving state to be compacted and flattened by the template; (3) repeating the step (2) until the thickness of the bondinglayer compacted and flattened by the template reaches the designed thickness of the bonding layer; and (4) hammering the stone on the bonding layer compacted and flattened by the template. Accordingto the invention, the labor intensity of constructors can be reduced, and the safety risk can also be reduced.
Owner:济南园林开发建设集团有限公司

Compaction machine for towed plum-blossom-shaped roller impact filling of soil and stone block wastes

PendingCN111172846AHigh leveling factorAchieving Towed Shock Operational EfficiencyRoads maintainenceSoil preservationGrindingAgricultural engineering
The invention discloses a compaction machine for towed plum-blossom-shaped roller impact filling of soil and stone block waste. The device structurally comprises a base, the device comprises a supporting column, a pressing oil cylinder, a lock catch clamping base, a lock shaft lifting and swinging device, a plum blossom grinding roller groove, a shaft cover cap and a linkage roller rod. Accordingto the invention, the lock shaft lifting and swinging device is matched with the plum-blossom-shaped grinding roller wheel groove; the towed plum blossom petal shell block is erected on the side of the lock shaft lifting and swinging device, and then the fan plate balancing weight and the stamping cylinder support are linked to form a cambered surface three-section type rolling effect. Three-station repeated compaction operation of filling and grinding is guaranteed by matching with inertia impact; the missing perfection after one-step compaction is improved; the construction efficiency and the fineness of plum blossom petal shell block rolling are ensured; the inner frame linkage roller rod of the compactor is matched with pressure injection of the stamping cylinder support to achieve theimpact filling effect of the soil and stone block waste, the integrity of a ground surface is improved, the bilateral sides of rolling are prevented from tilting, the overlaying hammering flatteningeffect is achieved, materials are saved for building filling of the foundation soil and stone block waste, and the foundation soil and stone block waste is fully used.
Owner:袁磊

Large-diameter cast-in-situ bored pile head overall breaking system and construction method

PendingCN113089671AReduce structural damageEnsure pouring qualityBulkheads/pilesRebarDrill hole
The invention belongs to the technical field of cast-in-situ pile construction. A large-diameter cast-in-situ bored pile head overall breaking system comprises a pile head separation support, isolation sleeves, a first counter-force frame, a second counter-force frame and a driving part, wherein the first counter-force frame and the second counter-force frame are correspondingly arranged up and down; the multiple isolation sleeves are arranged on the pile head separation support, longitudinal main ribs on the upper portion of a steel reinforcement cage of a cast-in-situ pile are arranged in the isolation sleeves in a matched and penetrating manner, and the pile head separation support and the isolation sleeves are poured on the top of the cast-in-situ pile; and a plurality of first counter-force holes are circumferentially distributed in a pile head of the cast-in-situ pile, a plurality of second counter-force holes are circumferentially distributed in the position, on the lower portion of the pile head separation support, of the cast-in-situ pile, and the first counter-force frame and the second counter-force frame are correspondingly arranged in the first counter-force holes and the second counter-force holes correspondingly. The invention further discloses a large-diameter cast-in-situ bored pile construction method. The large-diameter cast-in-situ bored pile head overall breaking system is reasonable in overall design, the problem existing in breaking of the pile head of the large-diameter cast-in-situ bored pile in the prior art can be solved, the breaking efficiency is improved, and the structural damage to a pile body is reduced.
Owner:HENAN HIGHWAY ENG GROUP +1

Tunnel monitoring equipment mounting trolley and using method thereof

The invention discloses a tunnel monitoring equipment mounting trolley and a using method thereof. The trolley comprises a walking mechanism, the walking mechanism comprises two walking bases arranged in a spaced mode and idler wheels arranged under the walking bases, the upper side of the walking mechanism is connected with a vertical telescopic mechanism, the vertical telescopic mechanism comprises four vertically-arranged hydraulic oil cylinders, and the upper side of the vertical telescopic mechanism is connected with a telescopic working platform. The telescopic working platform comprises a first platform plate and a second platform plate, and a third platform plate is slidably connected between the first platform plate and the second platform plate. The height and the width of the trolley can be conveniently adjusted, and the trolley can well adapt to the size of a rectangular tunnel; according to the tunnel monitoring equipment, passing of vehicles in the lower portion is not affected during operation, so that installation of the tunnel monitoring equipment gets rid of time limitation, installation can be carried out without waiting for specified maintenance time every week, high-strength installation does not need to be carried out at night, and the construction efficiency and safety of construction personnel are effectively guaranteed.
Owner:南京福欧地下空间数据科技有限公司 +2

Semantic description method for simulation service based on body

The invention relates to a semantic description method for a simulation service based on a body. The invention discloses a simulation service resource modeling method oriented to networking simulation. A prototype system for the method mainly comprises a resource service modeling description module, a functional service modeling description module and an application-oriented networking simulation service modeling description module. The semantic description method comprises the concrete implementation steps: performing attribute description on various modeling simulation resources in a networking simulation platform by the resource service modeling description module; describing a functional service attribute, an interface and a service process by the functional service modeling description module; performing the static contact and dynamic logic modeling description on the networking simulation service on the basis of the networking simulation service modeling description module. According to the semantic description method, the modeling description problem of various simulation service resources characterized by different granularity, isomerism, distribution, and the like, in engineering application is solved, and the effectiveness and the reusability of various simulation service resource descriptions in networking simulation engineering application are ensured.
Owner:BEIJING SIMULATION CENT

Fan blade storage mechanism and combined mechanism

The invention provides a fan blade storage mechanism and a combined mechanism. The fan blade storage mechanism comprises a head bracket and a tail bracket, wherein the head bracket is used for supporting the heads of fan blades; the tail bracket is used for supporting the tails of the fan blades; the head bracket and the tail bracket are arranged on supporting seats respectively; and the supporting seats are used for fixing the head bracket and the tail bracket correspondingly. Fan blade storage mechanisms are stacked in a combined manner to form the fan blade storage combined mechanism. According to the fan blade storage mechanism and the combined mechanism, the heads end and the tail ends of the fan blades can be stored, the placement stability of the fan blades and the effective height of the fan blades from the ground are ensured, and accumulated water and sludge are avoided. Moreover, the fan blade storage mechanisms can be stacked in a combined manner, so that the storage rate of the fan blades is increased; and the combined mechanisms can be detachably connected, so that transportation and storage are facilitated, an existing site is saved, and the construction efficiency is ensured.
Owner:CHINA FIRST METALLURGICAL GROUP

Ultra-long large-diameter pile foundation underwater operation platform unit, operation platform and construction method

PendingCN113152300AThe overall layout is reasonableImprove construction efficiency and stabilityArtificial islandsBridge erection/assemblyStructural stabilityCantilever
The invention belongs to the technical field of underwater pile foundation construction. The ultra-long large-diameter pile foundation underwater operation platform unit comprises a supporting barrel and a cantilever positioning guide frame, a guide assembly is arranged on the cantilever positioning guide frame and used for conducting radial limiting supporting on the supporting barrel, a supporting assembly is arranged on the supporting barrel, and the supporting assembly is used for supporting the supporting barrel. The supporting assembly is used for supporting the cantilever positioning guide frame. The invention further discloses a super-long large-diameter pile foundation underwater operation platform and a construction method. The overall arrangement is reasonable, the problems existing in construction of an existing ultra-long large-diameter pile foundation operation platform can be effectively solved, the structural stability and the construction efficiency are improved, modular arrangement can be achieved, and construction and control over the structural stability are more convenient.
Owner:HENAN HIGHWAY ENG GROUP +1

Excavation rod for installation of heat exchange pipe

ActiveCN106337459AGood for dredging and reamingImprove hollowing efficiencySoil-shifting machines/dredgersSprayerEngineering
The invention provides an excavation rod for installation of a heat exchange pipe. The excavation rod comprises a drive mechanism, an excavation rod body, a dirt removing device, a pipe body, a hole tamping device, a hole turning blade, a drill bit, a sprayer and an installation hole, wherein the excavation rod is installed on the lower portion of the drive mechanism, the dirt removing device is installed in the middle of the pipe body, the hole tamping device is installed at the bottom of the pipe body, the mounting hole is formed inside the pipe body, the hole turning blade is installed on the outer side of the drill bit, and the sprayer is installed at the lower end of the drill bit. The dirt removing device comprises a pipe wall, supporting plates, an end hole cover, an outer coating and a drainage pipe. The two supporting plates are arranged on the outer portion of the pipe wall. Through arrangement of the dirt removing device, the hole tamping device and the sprayer, the working efficiency can be improved advantageously, safety and reliability are achieved, the construction difficulty is reduced, and the excavation rod is convenient to apply and popularize on the market.
Owner:济宁高新科达科技项目服务有限公司

Anti-water-locking easily-dissolved alcohol-based fracturing fluid and preparation method thereof

The invention discloses an alcohol-based fracturing fluid capable of preventing water locking and easy to dissolve and a preparation method of the alcohol-based fracturing fluid, overcomes the defects that a conventional emulsion thickening agent system fracturing fluid is poor in high-temperature resistance and high-salt resistance, and also overcomes the defects that a conventional powder thickening agent fracturing fluid system is slow in dissolution and cannot be continuously mixed for construction. According to the specific technical scheme, the method comprises the following steps: adding the suspension stabilizer into the waterproof locking agent, performing stirring until the suspension stabilizer is completely dissolved, then adding the phase inversion agent, performing uniform mixing to prepare a suspension base solution, then adding the defoaming agent and the main agent polyacrylamide polymer powder into the suspension base solution, and performing uniform stirring at a high speed to obtain the waterproof locking alcohol group fracturing fluid. The preparation process is simple and rapid, and the quick-dissolving fracturing fluid is instant, does not need to be prepared in advance, is suitable for large-scale on-site fracturing, has the properties of temperature resistance, salt resistance and easiness in flowback, and can meet the fracturing construction requirements of tight gas reservoirs with low porosity, low permeability, high water saturation and the like.
Owner:SHAANXI UNIV OF SCI & TECH

Intelligent parking management system

The invention relates to the technical field of parking management systems, and discloses an intelligent parking management system which comprises a central processing unit and an entrance and exit gate, wherein the central processing unit comprises a signal transmission module, a parking space calculation module and a cloud server, a display screen is arranged in the entrance and exit gate, the data receiving end of the signal transmission module is in data connection with a parking space sensor, the data output end of the parking space calculation module is in data connection with a parking space layout module, the central processing unit is connected with the cloud server in a wireless WIFI mode, the data output end of the cloud server is in data connection with a login module, and the data receiving end of the login module is in data connection with a mobile phone client. According to the intelligent parking management system, a worker or a vehicle owner at the entrance and exit gate can conveniently observe the parking space information in the parking lot, the vehicle owner in the parking lot can conveniently know the parking space parking information in real time, and the parking efficiency of the vehicle owner is improved.
Owner:上海耀北智能化工程有限公司

Gantry crane combined beam device and installation method

InactiveCN110733975AImprove stabilityDoes not affect normal excavationLoad-engaging girdersClassical mechanicsMechanical engineering
The invention belongs to the technical field of shield construction, and relates to a gantry crane combined beam device and an installation method. Bailey trusses are taken as a beam body, 609 mm steel supports and I45 steel are taken as beam columns to be connected with an existing concrete structure, and members such as angle steel and the like are transversely fixed with retaining structures toenhance the overall stability of the beam body. In order to ensure that tracks are uniformly transferred to the Bailey trusses, I28 I-steel at spacing of 50 cm are used as distribution beams. The whole beam body is composed of steel structures. The bailey trusses are combined in advance before installation. Other members are blanked in position in advance according to the existing structural dimension. After a shield machine is lowered into the well, installation can be completed in 1-2 days by a crane. The device is convenient, fast and safe, does not affect normal tunneling of the shield machine, enables a gantry crane to be put into use in time, and ensures construction efficiency.
Owner:中建八局轨道交通建设有限公司

A bridge foundation construction method for old city reconstruction

The invention provides a bridge foundation construction method for old city reconstruction, comprising the following steps: S1, earthwork excavation, hoisting, excavating the pile foundation space for embedding the bridge foundation on the ground of the old city, and placing the earthwork It was hoisted from the inside to the outside. Due to the anchor cable buried under the old city, the earthwork could not be lifted normally. During the excavation of the pile foundation, an additional person fastened the safety belt and stood at the position of the anchor cable to hold the earthwork containing the earthwork. frame, to assist in lifting out the excavated earth and stone, and let the earth frame pass through the side of the anchor cable until the earth and stone are lifted smoothly; S2, install a steel casing, divide a rigid casing into multiple pieces, and assemble them in the pile hole to avoid Open the impact on the anchor cable in the pile; S3, install the reinforcement cage; S4, pour concrete pile foundation, in the case of existing houses around the high slope, when building the foundation of the highway bridge, this application can solve the problem of retaining wall anchor cable and retaining wall The technical problem of the collision between the wall lattice beam and the pile foundation ensures the construction efficiency and construction quality of the bridge foundation.
Owner:重庆共联建筑工程(集团)有限责任公司

Cantilever beam device used for installing steel box beam

The invention discloses a cantilever beam device used for installing a steel box beam. The device comprises a main beam which is horizontally placed and provided with a lifting lug, one end of a first supporting beam is connected with the upper surface of the left end of the main beam, the other end of the first supporting beam is connected with a first concrete bridge column, one end of a second supporting beam is connected with the upper surface of the right end of the main beam, the other end of the second supporting beam is connected with a second concrete bridge column, the main beam, the first supporting beam and the second supporting beam form a U-shaped beam, and N steel stand columns are arranged on the upper surface of the main beam. The technical effects that the steel box beam can be installed conveniently, site limitation is avoided, construction efficiency is not affected, cost is low and the cantilever beam device can be conveniently disassembled and reused are achieved through the cantilever beam structure.
Owner:CHINA MCC5 GROUP CORP

Self-propelled waterproof plate automatic laying device for tunnel construction

The invention discloses a self-propelled waterproof plate automatic laying device for tunnel construction. The self-propelled waterproof plate automatic laying device structurally comprises a fixing mounting disc, a base, an annular seat, a first driving arm, a waterproof plate fixing device, a second driving arm and a suction cup, and the base is mounted on the fixing mounting disc and fixedly connected with the fixing mounting disc. Under the joint effect of a first driving arm steering driving mechanism, a first driving arm auxiliary steering mechanism, a mechanical driving mechanism, a suction cup suction and release control mechanism, a suction cup control device, a second driving arm steering mechanism and an induction device, the driving arms can rotate to suck a waterproof plate, the suction cup and the waterproof plate are tightly attached through the atmospheric pressure, the waterproof plate is prevented from falling or moving in the waterproof plate moving or welding process, the situation that the waterproof plate falls, and re-taking consumes time is avoided, and the construction efficiency and results are guaranteed.
Owner:庄玉琼

Structure for air safety operation and construction method thereof

The invention discloses a structure for air safety operation and a construction method thereof. The structure comprises a steel column, a bearing structure, a limiting disc and a working platform, wherein the bearing structure is arranged on the steel column, the limiting disc detachably connected with the bearing structure, and the working platform is arranged between the bearing structure and the limiting disc. The structure has the beneficial effects of simplicity and convenience in construction, the safe construction platform can be quickly constructed as required, and a safe operation space is provided for workers on the premise that the platform construction efficiency is guaranteed.
Owner:CHINA MCC5 GROUP CORP

Channel excavation construction method and system

The invention provides a channel excavation construction method and system, and relates to the technical field of channel excavation, and the method comprises the steps: determining a pre-excavation region, planning a cruise route of an aerial camera in the pre-excavation region according to the pre-excavation region, and monitoring the arrangement points of an image head and a sensor; acquiring monitoring information acquired by the aerial camera, the monitoring image head and the sensor; establishing a BIM channel model according to the monitoring information, pre-stored design drawing information and pre-stored geological information, analyzing the BIM channel model, determining deformation sensitive points and water seepage points of the pre-excavation area, and giving out early warning; perfecting an original channel excavation scheme according to the early warning, and generating a first excavation scheme. Therefore, the safety risk can be found in time, the probability of construction accidents is reduced, and the construction efficiency is guaranteed.
Owner:浙江省围海建设集团股份有限公司
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