CN213458377U - Communication device for geological disaster early warning - Google Patents

Communication device for geological disaster early warning Download PDF

Info

Publication number
CN213458377U
CN213458377U CN202023134228.XU CN202023134228U CN213458377U CN 213458377 U CN213458377 U CN 213458377U CN 202023134228 U CN202023134228 U CN 202023134228U CN 213458377 U CN213458377 U CN 213458377U
Authority
CN
China
Prior art keywords
rectangular
plate
communication device
early warning
geological
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202023134228.XU
Other languages
Chinese (zh)
Inventor
吕文斌
仇新迪
保善磊
张文涛
阿燕仁
吴文正
樊光洁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qinghai Disaster Reduction Center
Original Assignee
Qinghai Disaster Reduction Center
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qinghai Disaster Reduction Center filed Critical Qinghai Disaster Reduction Center
Priority to CN202023134228.XU priority Critical patent/CN213458377U/en
Application granted granted Critical
Publication of CN213458377U publication Critical patent/CN213458377U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Road Signs Or Road Markings (AREA)

Abstract

The utility model discloses a communication device of geological disaster early warning, including geological fire early warning communication device body, geological fire early warning communication device body is including extending the board, fixing at the check out test set at extension board top and install the solar panel at the check out test set top, the equal fixed mounting in bottom four corners of extension board has fixed cylinder, the equal activity in top four corners of extension board is inlayed and is equipped with the rectangular pipe, and rectangular pipe screw fastening is at the top of extension board, and sliding sleeve is equipped with the rectangular rod in the rectangular pipe, and the top of four rectangular rods extends to the top and the fixed mounting of the rectangular pipe that corresponds respectively has same return plate. The utility model relates to a rationally, be convenient for alleviate the eminence and drop the collision impact force of object, reduce the damage risk that causes because of the impact force is great to reach the whole purpose of protecting, and be convenient for realize the dismouting change operation of V-arrangement printing opacity guard plate fast, satisfy the user demand, be favorable to the use.

Description

Communication device for geological disaster early warning
Technical Field
The utility model relates to a geological disaster early warning communication equipment technical field especially relates to a communication device of geological disaster early warning.
Background
Geological disasters refer to geological effects formed under the action of natural or human factors and causing damage and loss to human life and property and environment, such as collapse, landslide, debris flow, ground cracks, water and soil loss, land desertification and swampiness, soil salinization, earthquakes, volcanoes, geothermal hazards and the like, the occurrence of geological disasters easily causes great personal injury and property loss, great harm is brought to the life and property safety of people, threats and damage to the life of people caused by geological disasters are reduced, the geological disaster monitoring and early warning technology is continuously developed, and monitoring equipment and devices aiming at the geological disasters play important roles in the geological disaster monitoring and early warning process, for example, the application number: 201922132632.4 discloses a geological disaster early warning and forecasting device, which comprises a monitoring terminal, a data processing platform, a data statistics processing unit, an early warning unit, a fixed terminal, a detection device and a sensor unit, wherein the monitoring terminal is connected to the data processing cloud platform in a communication way to realize data transmission, the data processing cloud platform is connected to the data statistics processing unit of a monitoring mechanism center in a communication way, the data statistics processing unit is connected to the early warning unit in a communication way, the monitoring terminal comprises a detection device, a fixed terminal and a sensor unit, an extension plate for reinforcement extends from the bottom of the detection device, a mounting hole is formed in the extension plate, the fixed terminal is inserted in the mounting hole for fixed mounting and comprises a fixed cylinder, a spiral drill bit and a limiting part, the geological disaster early warning and forecasting device does not need to dig a deep embedding groove, and the sensor and other sensing parts are sent into the underground cylinder through, the stratum structure is not damaged in a large area, and the monitoring mechanism can be fastened to the ground;
can realize the communication transmission to the data through monitor terminal in the above-mentioned patent to reach the purpose of timely communication, communication device of current geological disaster early warning realizes the communication through monitor terminal equally when using, but communication device of current geological disaster early warning lacks protective structure, when using under the environment abominable, it is great to have the risk of being hit bad by high object to drop, can not satisfy the user demand, therefore we have proposed a communication device of geological disaster early warning to be used for solving above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a communication device for geological disaster early warning.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a geological disaster early warning communication device comprises a geological fire early warning communication device body, wherein the geological fire early warning communication device body comprises an extension plate, a detection device and a solar panel, the detection device is fixed at the top of the extension plate, the solar panel is installed at the top of the detection device, fixed cylinders are fixedly installed at four corners of the bottom of the extension plate, rectangular tubes are movably embedded at four corners of the top of the extension plate, the rectangular tubes are fastened at the top of the extension plate in a threaded mode, rectangular rods are sleeved in the rectangular tubes in a sliding mode, the top ends of the four rectangular rods respectively extend to the upper side of the corresponding rectangular tubes and are fixedly installed with the same return plate, a buffer spring is fixedly installed between the top ends of the rectangular tubes and the bottom of the return plate, the buffer spring is movably sleeved on the corresponding rectangular rods, a V-shaped light-transmitting protection plate is movably contacted at the top of the, the return plate movable sleeve is established on two bracing pieces, fixed cover is equipped with the limiting plate on the bracing piece, the bottom of limiting plate and the top movable contact of return plate, the draw-in groove has been seted up on the right side of bracing piece, movable clamping has the kelly in the draw-in groove, two first grooves have been seted up to the bottom of return plate, the one end that two kellies are close to each other extends to corresponding first inslot and fixed mounting respectively has the movable block, movable block slidable mounting is on the top inner wall in corresponding first groove, fixed mounting has first spring between the right side of movable block and the right side inner wall in corresponding first groove, the bottom of two movable blocks all extends to the bottom of return plate and fixed mounting has same pin, the bottom fixed mounting of pin has the arc handle.
Preferably, the inner wall of one side, far away from each other, of the left rectangular pipe and the right rectangular pipe is provided with a limiting hole, the side, far away from each other, of the left rectangular pipe and the right rectangular pipe is fixedly provided with a limiting block, and the limiting blocks are connected with the corresponding limiting holes in a sliding mode.
Preferably, two first rectangular holes are formed in the top of the return-shaped plate, the inner walls of the first rectangular holes are in movable contact with the outer sides of the corresponding support rods, second rectangular holes are formed in the inner walls of the right sides of the first rectangular holes, and the inner walls of the second rectangular holes are in movable contact with the outer sides of the corresponding clamping rods.
Preferably, a T-shaped sliding rail is fixedly mounted on the inner wall of the top of the first groove, a T-shaped sliding groove is formed in the top of the moving block, and the T-shaped sliding rail is in sliding connection with the corresponding T-shaped sliding groove.
Preferably, threaded holes are formed in the inner wall of one side, away from each other, of the two rectangular pipes which are opposite to each other in the left-right direction, T-shaped fastening bolts are sleeved in threaded holes, the extending plate is sleeved on the four T-shaped fastening bolts in a threaded mode, the embedded holes are formed in four corners of the top of the extending plate, and the inner wall of each embedded hole is in movable contact with the outer side of the corresponding rectangular pipe.
Preferably, the top of the limiting plate is provided with a mounting hole, and the inner wall of the mounting hole is fixedly connected with the outer side of the corresponding supporting rod.
Compared with the prior art, the beneficial effects of the utility model are that:
through the extension board, check out test set, solar panel, the fixed cylinder, V-arrangement printing opacity guard plate, the rectangular pipe, the shape returning plate, the rectangular rod, buffer spring, the bracing piece, the limiting plate, first rectangular hole, the draw-in groove, the kelly, the first groove, a first spring, the movable block, thin rod and arc handle cooperate, when eminence dropped the object, at first strike the top of V-arrangement printing opacity guard plate, drive V-arrangement printing opacity guard plate downstream, V-arrangement printing opacity guard plate drives the shape returning plate downstream through two bracing pieces and two gag lever posts simultaneously, shape returning plate moves four rectangular rods and slides down and compress four buffer spring in the rectangular pipe that corresponds respectively, under buffer spring's elastic force effect, the impact force that eminence object dropped has been alleviated, thereby reach the whole mesh of protecting, when needing to take off V-arrangement printing opacity guard plate, promote arc handle to the right and drive two movable blocks through thin rod respectively on the T-arrangement slide rail that corresponds and slide right and slide Compress first spring, the movable block drives the kelly that corresponds and shifts out to the right from the draw-in groove, upwards stimulate V-arrangement printing opacity guard plate immediately and drive two bracing pieces and divide and shift out from the first rectangle downthehole that corresponds, can take off V-arrangement printing opacity guard plate, when installing, press down V-arrangement printing opacity guard plate and drive two bracing pieces and insert corresponding first rectangle downthehole respectively, the bracing piece drives the gag lever post that corresponds and when moving down to the top contact with the returning plate, relax the thrust to arc handle rightwards, the elasticity of the first spring that is in compression state drives the kelly through the movable block that corresponds and moves to the draw-in groove left this moment, and then make V-arrangement printing opacity guard plate fixed, and then accomplished the installation.
The utility model relates to a rationally, be convenient for alleviate the eminence and drop the collision impact force of object, reduce the damage risk that causes because of the impact force is great to reach the whole purpose of protecting, and be convenient for realize the dismouting change operation of V-arrangement printing opacity guard plate fast, satisfy the user demand, be favorable to the use.
Drawings
Fig. 1 is a schematic cross-sectional structural diagram of a communication device for geological disaster early warning provided by the present invention;
fig. 2 is an enlarged schematic view of a portion a in fig. 1.
In the figure: 100 extension boards, 101 detection equipment, 102 solar panels, 103 fixed columns, 1V-shaped light-transmitting protection plates, 2 rectangular pipes, 3 return-shaped boards, 4 rectangular rods, 5 buffer springs, 6 supporting rods, 7 limiting plates, 8 first rectangular holes, 9 clamping grooves, 10 clamping rods, 11 first grooves, 12 first springs, 13 moving blocks, 14 thin rods and 15 arc-shaped handles.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-2, a communication device for geological disaster early warning, comprising a geological fire early warning communication device body, wherein the geological fire early warning communication device body comprises an extension plate 100, a detection device 101 fixed on the top of the extension plate 100, and a solar panel 102 installed on the top of the detection device 101, four corners of the bottom of the extension plate 100 are all fixedly provided with fixed cylinders 103, four corners of the top of the extension plate 100 are all movably embedded with rectangular tubes 2, the rectangular tubes 2 are fastened on the top of the extension plate 100 in a threaded manner, rectangular rods 4 are slidably sleeved in the rectangular tubes 2, the top ends of the four rectangular rods 4 respectively extend to the upper side of the corresponding rectangular tubes 2 and are fixedly provided with the same return plate 3, a buffer spring 5 is fixedly installed between the top end of the rectangular tubes 2 and the bottom of the return plate 3, the buffer spring 5 is movably sleeved on the corresponding rectangular rods 4, the top of the return plate 3 is movably contacted with, two support rods 6 are fixedly installed on the inner side of the V-shaped light-transmitting protection plate 1, the clip plate 3 is movably sleeved on the two support rods 6, a limit plate 7 is fixedly sleeved on the support rods 6, the bottom of the limit plate 7 is movably contacted with the top of the clip plate 3, a clamping groove 9 is formed in the right side of the support rods 6, clamping rods 10 are movably clamped in the clamping groove 9, two first grooves 11 are formed in the bottom of the clip plate 3, the mutually close ends of the two clamping rods 10 respectively extend into the corresponding first grooves 11 and are fixedly provided with moving blocks 13, the moving blocks 13 are slidably installed on the inner walls of the tops of the corresponding first grooves 11, first springs 12 are fixedly installed between the right sides of the moving blocks 13 and the inner walls of the right sides of the corresponding first grooves 11, the bottoms of the two moving blocks 13 both extend to the bottom of the clip plate 3 and are fixedly provided with the same thin rod 14, and arc, the utility model relates to a rationally, be convenient for alleviate the eminence and drop the collision impact force of object, reduce the damage risk that causes because of the impact force is great to reach the whole purpose of protecting, and be convenient for realize the dismouting change operation of V-arrangement printing opacity guard plate 1 fast, satisfy the user demand, be favorable to the use.
In the utility model, the inner wall of the side far away from each other of the two rectangular tubes 2 opposite to each other on the left and right is provided with a limit hole, the side far away from each other of the two rectangular rods 4 opposite to each other on the left and right is fixedly provided with a limit block which is connected with the corresponding limit hole in a sliding way, the top of the clip plate 3 is provided with two first rectangular holes 8, the inner wall of the first rectangular hole 8 is movably contacted with the outer side of the corresponding support rod 6, the inner wall of the right side of the first rectangular hole 8 is provided with a second rectangular hole, the inner wall of the second rectangular hole is movably contacted with the outer side of the corresponding clamping rod 10, the inner wall of the top of the first groove 11 is fixedly provided with a T-shaped slide rail, the top of the moving block 13 is provided with a T-shaped slide groove which is connected with a corresponding T-shaped internal thread in a sliding way, the inner wall of the side far, the 100 threaded sleeves of extension board are established on four T shape fastening bolt, and the inlay dress hole has all been seted up in the top four corners of extension board 100, inlays the inner wall of dress hole and the outside movable contact of the rectangular pipe 2 that corresponds, and the mounting hole has been seted up at the top of limiting plate 7, the inner wall of mounting hole and the outside fixed connection of the bracing piece 6 that corresponds, the utility model relates to a rationally, be convenient for alleviate the collision impact force that the eminence dropped the object, reduce the damage risk that causes because of the impact force is great to reach the whole mesh of protecting, and be convenient for realize the dismouting change operation of V-arrangement printing opacity guard plate 1 fast, satisfy the user demand, be favorable to the use.
The working principle is as follows: when the device is used, when an object falls from a high place, the impact force of the falling object firstly impacts the top of the V-shaped light-transmitting protection plate 1, the impacting force drives the V-shaped light-transmitting protection plate 1 to move downwards, the V-shaped light-transmitting protection plate 1 drives the two support rods 6 to move downwards, the two support rods 6 simultaneously drive the return plate 3 to move downwards through the two limiting rods 7, the return plate 3 drives the four rectangular rods 4 to respectively slide downwards in the corresponding rectangular tubes 2 while moving downwards, the four buffer springs 5 are compressed while the return plate 3 moves downwards, the impact force caused by the falling of the object from the high place is relieved under the elastic force action of the buffer springs 5, the damage risk caused by large impact force is reduced, and the whole protection purpose is achieved;
when the V-shaped light-transmitting protection plate 1 needs to be taken down and replaced, the arc-shaped handle 15 is pushed rightwards, the arc-shaped handle 15 drives the thin rod 14 to move rightwards, the thin rod 14 drives the two moving blocks 13 to respectively slide on the corresponding T-shaped sliding rails, the moving blocks 13 compress the corresponding first springs 12 rightwards when moving, the moving blocks 13 drive the corresponding clamping rods 10 to move out from the clamping grooves 9 rightwards, the fixing of the V-shaped light-transmitting protection plate 1 is released, then the V-shaped light-transmitting protection plate 1 is pulled upwards to drive the two supporting rods 6 to move out from the corresponding first rectangular holes 8 respectively, the V-shaped light-transmitting protection plate 1 can be taken down, when the V-shaped light-transmitting protection plate 1 is installed, the supporting rods 6 on the V-shaped light-transmitting protection plate 1 are aligned with the corresponding first rectangular holes 8, the V-shaped light-transmitting protection plate 1 is pressed downwards, the V-shaped light-transmitting protection, bracing piece 6 drives corresponding gag lever post 7 downstream to with return when the top contact of shape board 3, this moment kelly 10 is aligned with corresponding draw-in groove 9, relax the thrust to arc handle 15 right, first spring 12 that is in compression state resets this moment, the elasticity of first spring 12 drives kelly 10 through corresponding movable block 13 and moves to the draw-in groove 9 left in, kelly 10 clamps with corresponding draw-in groove 9 mutually, and then make V-arrangement printing opacity guard plate 1 fixed, and then accomplished the installation, make the dismouting operation of being convenient for realize V-arrangement printing opacity guard plate 1 fast, improve and use the flexibility.
In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (6)

1. The geological disaster early warning communication device comprises a geological fire early warning communication device body, wherein the geological fire early warning communication device body comprises an extension plate (100), a detection device (101) fixed at the top of the extension plate (100) and a solar panel (102) installed at the top of the detection device (101), fixed cylinders (103) are fixedly installed at four corners of the bottom of the extension plate (100), the geological disaster early warning communication device is characterized in that rectangular pipes (2) are movably embedded at four corners of the top of the extension plate (100), the rectangular pipes (2) are fastened at the top of the extension plate (100) in a threaded manner, rectangular rods (4) are slidably sleeved in the rectangular pipes (2), the top ends of the four rectangular rods (4) respectively extend to the upper side of the corresponding rectangular pipes (2) and are fixedly provided with the same return plate (3), and a buffer spring (5) is fixedly installed between the top ends of the rectangular pipes (2) and the bottom of the return plate (3, buffer spring (5) movable sleeve is established on corresponding rectangle pole (4), the top movable contact of returning plate (3) has V-arrangement printing opacity guard plate (1), the inboard fixed mounting of V-arrangement printing opacity guard plate (1) has two bracing pieces (6), returning plate (3) movable sleeve is established on two bracing pieces (6), fixed cover is equipped with limiting plate (7) on bracing piece (6), the bottom of limiting plate (7) and the top movable contact of returning plate (3), draw-in groove (9) have been seted up on the right side of bracing piece (6), movable clamping is equipped with kelly (10) in draw-in groove (9), two first grooves (11) have been seted up to the bottom of returning plate (3), the right-hand member of kelly (10) extends to in corresponding first groove (11) and fixed mounting has movable block (13), movable block (13) slidable mounting is on the top inner wall in corresponding first groove (11), fixed mounting has first groove (11) between the right side of movable block (13) and the right side inner wall in corresponding first groove (11), fixed mounting The bottom of the two moving blocks (13) extends to the bottom of the return-shaped plate (3) and is fixedly provided with the same thin rod (14), and the bottom of the thin rod (14) is fixedly provided with an arc-shaped handle (15).
2. The communication device for geological disaster early warning as claimed in claim 1, wherein the inner wall of one side of the left rectangular pipe (2) and the right rectangular pipe (2) away from each other is provided with a limiting hole, the side of one side of the left rectangular pipe (4) and the right rectangular pipe (4) away from each other is fixedly provided with a limiting block, and the limiting blocks are connected with the corresponding limiting holes in a sliding manner.
3. The communication device for geological disaster early warning as claimed in claim 1, wherein the top of the return plate (3) is provided with two first rectangular holes (8), the inner walls of the first rectangular holes (8) are in movable contact with the outer sides of the corresponding support rods (6), the inner wall of the right side of the first rectangular hole (8) is provided with a second rectangular hole, and the inner wall of the second rectangular hole is in movable contact with the outer sides of the corresponding clamping rods (10).
4. The communication device for warning of geological disasters according to claim 1, wherein a T-shaped slide rail is fixedly mounted on the inner wall of the top of the first groove (11), a T-shaped sliding groove is formed in the top of the moving block (13), and the T-shaped slide rail is slidably connected with the corresponding T-shaped sliding groove.
5. The communication device for the geological disaster early warning according to the claim 1, wherein the inner wall of one side of the two rectangular pipes (2) opposite to each other is provided with a threaded hole, a T-shaped fastening bolt is sleeved in the threaded hole, the extension plate (100) is sleeved on the four T-shaped fastening bolts in a threaded manner, four corners of the top of the extension plate (100) are provided with embedded holes, and the inner wall of each embedded hole is in movable contact with the outer side of the corresponding rectangular pipe (2).
6. The communication device for geological disaster early warning according to claim 1, wherein the top of the limiting plate (7) is provided with a mounting hole, and the inner wall of the mounting hole is fixedly connected with the outer side of the corresponding support rod (6).
CN202023134228.XU 2020-12-23 2020-12-23 Communication device for geological disaster early warning Active CN213458377U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202023134228.XU CN213458377U (en) 2020-12-23 2020-12-23 Communication device for geological disaster early warning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023134228.XU CN213458377U (en) 2020-12-23 2020-12-23 Communication device for geological disaster early warning

Publications (1)

Publication Number Publication Date
CN213458377U true CN213458377U (en) 2021-06-15

Family

ID=76305661

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202023134228.XU Active CN213458377U (en) 2020-12-23 2020-12-23 Communication device for geological disaster early warning

Country Status (1)

Country Link
CN (1) CN213458377U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114287212A (en) * 2021-12-07 2022-04-08 台前县金园农业机械有限公司 Seeder leveler linkage
CN115076531A (en) * 2022-05-30 2022-09-20 朱慧超 Many topography adaptation installation type geological disasters early warning device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114287212A (en) * 2021-12-07 2022-04-08 台前县金园农业机械有限公司 Seeder leveler linkage
CN115076531A (en) * 2022-05-30 2022-09-20 朱慧超 Many topography adaptation installation type geological disasters early warning device
CN115076531B (en) * 2022-05-30 2023-09-29 四川得圆岩土工程有限责任公司 Multi-terrain adaptive installation type geological disaster early warning device

Similar Documents

Publication Publication Date Title
CN213458377U (en) Communication device for geological disaster early warning
CN212429614U (en) Wide antidetonation support for building electromechanical device of application scope
CN210860260U (en) Civil engineering antidetonation additional strengthening
CN215441960U (en) Pre-buried formula strip mine side slope support device
CN206844692U (en) A kind of semi-automatic safety protective shed for high-rise building construction
CN212963066U (en) Deep basal pit lithosphere blasting protector
CN217026992U (en) Protection mechanism for foundation detection device
CN209816732U (en) Anticollision building rail guard
CN113404178A (en) Civil engineering shock-absorbing structure capable of resisting middle-earthquake and large-earthquake damage
CN217950191U (en) Embedded mounting structure's explosion-proof formula people's air defense door
CN113029487A (en) Model testing device for building safety
CN207332415U (en) A kind of civil engineering antishock device
CN213335821U (en) Mine reclamation blasting device with safety protection structure
CN213176643U (en) Civil engineering construction pre-buried equipment
CN214790339U (en) Noise sound wave monitoring device
CN214831997U (en) Bridge engineering protector
CN212104129U (en) Disaster prevention device for geological soft surface
CN212958483U (en) Geological prevention and control water drilling machine drill rod maintenance device
CN215632076U (en) Anti-collision device for cement pole
CN210264767U (en) Tunnel roof prevents strutting arrangement that collapses
CN210768010U (en) Regularization block terminal protection canopy
CN109935977A (en) A kind of building machinery temporary electricity earthing or grounding means
CN215411046U (en) Monitoring point warning device for engineering survey
CN217205670U (en) Green building isolation bearing
CN218622251U (en) Side slope supporting structure for foundation pit protection

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant