CN112343087A - Electric power apron with protective structure - Google Patents
Electric power apron with protective structure Download PDFInfo
- Publication number
- CN112343087A CN112343087A CN202011055036.1A CN202011055036A CN112343087A CN 112343087 A CN112343087 A CN 112343087A CN 202011055036 A CN202011055036 A CN 202011055036A CN 112343087 A CN112343087 A CN 112343087A
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- China
- Prior art keywords
- cover plate
- movable
- electric power
- cavity
- protective structure
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- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
- E02D29/1454—Non-circular covers, e.g. hexagonal, elliptic
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
- E02D29/1418—Covers for manholes or the like; Frames for covers with implements to assist in lifting, e.g. counterweights, springs
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/16—Shapes
- E02D2200/1628—Shapes rectangular
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The invention discloses an electric power cover plate with a protection structure, which comprises an installation seat, a fixed block and a threaded sleeve, wherein a fixed cover plate is arranged inside the installation seat, a movable cover plate is arranged inside the fixed cover plate, the top end of the movable cover plate extends to the upper part of the fixed cover plate, the protection structure is arranged at the bottom end inside the installation seat, and first cavities are formed in the inner parts of two sides of the fixed cover plate. According to the invention, the rotating rod is rotated manually to drive the second bevel gear to rotate, the first bevel gear rotates to drive the rotating rod to rotate due to the meshing fit between the second bevel gear and the first bevel gear, so that the threaded rod rotates along with the rotation, and the threaded sleeve moves on the threaded rod through the sliding fit between the sliding block and the sliding groove to push the clamping tongue to move to the inside of the clamping groove, so that the electric power cover plate is conveniently and quickly mounted and dismounted, and the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of protective equipment, in particular to an electric power cover plate with a protective structure.
Background
The electric power apron is an electric power supporting device, and mainly used protection power equipment carries out the apron of closing cap to roadside cable well, can play and cover and protect the cable effect, can play the warning simultaneously and be convenient for the effect of maintaining, generally pours by steel sheet and cement and forms, has higher intensity, along with the development of society, the improvement of urbanization degree, and the electric power apron is everywhere visible in the life, and current electric power apron exists a lot of weak points when using.
When the first and the traditional electric cover plates are used, a protective structure is not arranged, and when the electric cover plates are rolled by a vehicle for a long time, the electric cover plates are deformed and collapsed;
second, when the traditional electric cover plate is used, the installation and the disassembly are inconvenient, and the manual installation and the disassembly are time-consuming and labor-consuming for maintenance;
thirdly, traditional electric power apron does not have wear-resisting function when using, and long-time use can lead to the wearing layer on electric power apron surface to disappear, produces the potential safety hazard easily.
Disclosure of Invention
The invention aims to provide an electric power cover plate with a protective structure, and aims to solve the problems that the electric power cover plate without the protective structure is inconvenient to mount and dismount and does not have a wear-resisting function, which are proposed in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an electric power apron with protective structure, includes mount pad, fixed block and thread bush, the inside of mount pad is provided with fixed cover plate, fixed cover plate's inside is provided with removable cover, and removable cover plate's top extends to fixed cover plate's top, the inside bottom of mount pad is provided with protective structure, first cavity has all been seted up to the inside of fixed cover plate both sides, the equal fixedly connected with fixed block in one side of fixed cover plate top, the second cavity has evenly been seted up on removable cover plate's top, and reset spring is all installed to the both sides of second cavity bottom, the movable block is all installed on reset spring's top, and the top of movable block all extends to removable cover plate's top, the equal fixedly connected with abrasive rubber piece in top of movable block.
Preferably, the locating slot has all been seted up to the intermediate position department on the inside top of mount pad, the equal fixedly connected with locating piece in the centre of fixed cover plate bottom one side, and the bottom of locating piece all extends to the inside of locating slot.
Preferably, protective structure's inside has set gradually casing, buffer spring, sleeve, hinge bar, installation spring, installation pole and fly leaf, the casing sets up in the inside bottom of mount pad, the inside bottom of casing transversely is provided with the installation pole, the installation spring is evenly installed on the inside top of installation pole both ends casing, the fly leaf is installed on the top of installation spring, and the top of fly leaf extends to casing top removable cover's below.
Preferably, the both sides of installation pole outer wall all are equipped with buffer spring, and buffer spring side-mounting pole's outer wall all overlaps and is equipped with the sleeve, telescopic both ends all have the hinge bar through articulated elements swing joint, and the top of hinge bar all through articulated elements swing joint in the bottom of fly leaf.
Preferably, the equal vertical penetrating in top of fixed block has the swing arm, and the bottom of swing arm all extends to the inside of first cavity, the equal fixedly connected with second conical gear in bottom of the inside swing arm of first cavity, the inside of the first cavity of second conical gear below all transversely is provided with the bull stick, the outer wall of one side bull stick of second conical gear below all overlaps and is equipped with first conical gear, the equal fixedly connected with threaded rod in one side of bull stick, and the outer wall of threaded rod all overlaps and is equipped with the thread bush.
Preferably, the spout has all been seted up to one side at first cavity both ends, the both ends of thread bush all are through mounting fixedly connected with slider, and the one end of slider all extends to the inside one end of spout, the draw-in groove has all been seted up to one side that the mount pad is close to fixed apron, one side fixedly connected with block tongue that first conical gear was kept away from to the thread bush, and one side of block tongue all extends to the inside of draw-in groove.
Compared with the prior art, the invention has the beneficial effects that:
(1) by installing the buffer spring, the sleeve, the hinge rod, the mounting spring, the mounting rod and the movable plate, when a vehicle or a pedestrian passes through the top end of the movable cover plate, the movable cover plate pushes the movable plate to move downwards when moving downwards, so that the mounting spring at the bottom end of the movable plate is stressed and compressed to play a role in buffering, meanwhile, the movable plate moves downwards to push the hinge rod, and the hinge rod pushes the sleeves on two sides because the hinge rod is movably connected with the movable plate and the sleeves through the hinge parts;
(2) the clamping tongue, the sliding block, the rotary rods, the first bevel gear, the second bevel gear, the threaded rod and the threaded sleeve are installed, the two rotary rods are manually and simultaneously rotated, the rotary rods are movably connected with the fixed block, so that the rotary rods rotate to drive the second bevel gear to rotate, the second bevel gear is meshed with the first bevel gear, so that the first bevel gear rotates to drive the rotary rods to rotate, the threaded rods rotate along with the rotary rods, the threaded sleeve is in threaded fit with the threaded rod, the threaded sleeve moves on the threaded rods through sliding fit between the sliding block and the sliding groove, the clamping tongue is pushed to move to the inside of the clamping groove, the electric power cover plate is conveniently and quickly installed and detached, and the working efficiency is improved;
(3) through installing the second cavity, reset spring, the abrasive rubber piece, the movable block, when passerby or vehicle crossed electric power apron surface, play antiskid and wear-resisting effect through setting up the abrasive rubber piece, move down when the abrasive rubber piece is to pressure, because be sliding fit between movable block and the second cavity, make the movable block remove down, force reset spring atress compression, play the cushioning effect, realized that electric power apron has wear-resisting protection's function, prevent that electric power apron surface from leading to the surface to be ground flat because of long-time the use, cause the potential safety hazard.
Drawings
FIG. 1 is a front cross-sectional structural schematic view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic top view of the housing of the present invention;
fig. 4 is an enlarged schematic view of a portion a in fig. 1 according to the present invention.
In the figure: 1. a mounting seat; 2. positioning a groove; 3. positioning blocks; 4. a chute; 5. a card slot; 6. a latch; 7. a slider; 8. rotating the rod; 9. a protective structure; 901. a housing; 902. a buffer spring; 903. a sleeve; 904. a hinged lever; 905. installing a spring; 906. mounting a rod; 907. a movable plate; 10. a fixed block; 11. a removable cover plate; 12. a first bevel gear; 13. a second bevel gear; 14. a rotating rod; 15. a first cavity; 16. a threaded rod; 17. a threaded sleeve; 18. fixing the cover plate; 19. a second cavity; 20. a return spring; 21. a wear-resistant rubber block; 22. a movable block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, an embodiment of the present invention is shown: an electric power cover plate with a protection structure comprises a mounting seat 1, a fixed block 10 and a threaded sleeve 17, wherein a fixed cover plate 18 is arranged inside the mounting seat 1;
the middle position of the top end inside the mounting seat 1 is provided with a positioning groove 2, the middle of one side of the bottom end of the fixed cover plate 18 is fixedly connected with a positioning block 3, and the bottom ends of the positioning blocks 3 extend into the positioning groove 2;
specifically, as shown in fig. 1, when the cover device is used, the positioning block 3 is inserted into the positioning groove 2 through the cooperation between the positioning groove 2 and the positioning block 3, so as to fix the positioning and fixing cover plate 18 inside the mounting seat 1;
a movable cover plate 11 is arranged inside the fixed cover plate 18, the top end of the movable cover plate 11 extends to the upper part of the fixed cover plate 18, and a protective structure 9 is arranged at the bottom end inside the mounting seat 1;
a shell 901, a buffer spring 902, a sleeve 903, a hinge rod 904, a mounting spring 905, a mounting rod 906 and a movable plate 907 are sequentially arranged in the protective structure 9, the shell 901 is arranged at the bottom end in the mounting base 1, the mounting rod 906 is transversely arranged at the bottom end in the shell 901, the mounting springs 905 are uniformly mounted at the top ends of the two ends of the mounting rod 906 in the shell 901, the movable plate 907 is mounted at the top end of the mounting spring 905, and the top end of the movable plate 907 extends to the lower part of the movable cover plate 11 above the shell 901;
specifically, as shown in fig. 1 and 3, when the cover device is used, when the movable cover plate 11 is stressed, the movable cover plate 11 moves downward due to the sliding fit between the movable cover plate 11 and the fixed cover plate 18, and the movable plate 907 is pushed to move downward, so that the mounting spring 905 at the bottom end of the movable plate 907 is stressed and compressed to play a role of buffering;
the two sides of the outer wall of the mounting rod 906 are both sleeved with buffer springs 902, the outer wall of the mounting rod 906 on one side of each buffer spring 902 is sleeved with a sleeve 903, the two ends of each sleeve 903 are both movably connected with a hinge rod 904 through hinges, and the top ends of the hinge rods 904 are both movably connected to the bottom ends of the movable plates 907 through hinges;
specifically, as shown in fig. 1 and 3, when the cover device is used, when the movable plate 907 moves downward, the hinge rod 904 is pushed, since the hinge rod 904 is movably connected with the movable plate 907 and the sleeve 903 through hinges, the hinge rod 904 moves downward, the sleeves 903 on two sides are pushed, and since the sleeves 903 and the mounting rod 906 are in sliding fit, the sleeves 903 move upward on the mounting rod 906, and the buffer springs 902 on one side of the sleeves 903 are forced to be compressed to play a buffer role;
the inner parts of two sides of the fixed cover plate 18 are both provided with first cavities 15, and one side of the top end of the fixed cover plate 18 is fixedly connected with a fixed block 10;
the top ends of the fixing blocks 10 vertically penetrate through the rotary rods 8, the bottom ends of the rotary rods 8 extend into the first cavity 15, the bottom ends of the rotary rods 8 in the first cavity 15 are fixedly connected with second bevel gears 13, rotary rods 14 are transversely arranged in the first cavity 15 below the second bevel gears 13, the outer wall of the rotary rod 14 on one side below the second bevel gears 13 is sleeved with a first bevel gear 12, one side of each rotary rod 14 is fixedly connected with a threaded rod 16, and the outer wall of each threaded rod 16 is sleeved with a threaded sleeve 17;
specifically, as shown in fig. 1, when the cap device is used, the manual screw 8 rotates the screw 8 to drive the second bevel gear 13 to rotate due to the movable connection between the screw 8 and the fixed block 10, and the first bevel gear 12 rotates to drive the screw 14 to rotate due to the meshing fit between the second bevel gear 13 and the first bevel gear 12, so that the threaded rod 16 rotates along with the screw;
one side of each of two ends of the first cavity 15 is provided with a sliding groove 4, two ends of the threaded sleeve 17 are fixedly connected with a sliding block 7 through a fixing piece, one end of each sliding block 7 extends to one end inside the sliding groove 4, one side of the mounting seat 1, which is close to the fixed cover plate 18, is provided with a clamping groove 5, one side of the threaded sleeve 17, which is far away from the first bevel gear 12, is fixedly connected with a clamping tongue 6, and one side of the clamping tongue 6 extends to the inside of the clamping groove 5;
specifically, as shown in fig. 1, when the cover device is used, the threaded sleeve 17 rotates, and due to the fact that the threaded sleeve 17 is in threaded fit with the threaded rod 16, the threaded sleeve 17 moves towards two sides on the threaded rod 16 through sliding fit between the sliding block 7 and the sliding groove 4, the clamping tongue 6 is pushed to move to the inside of the clamping groove 5, and installation of the electric power cover plate is completed;
The working principle is as follows: when in use, firstly, the base is arranged in the ground, then the positioning block 3 is inserted into the positioning groove 2 through the matching between the positioning groove 2 and the positioning block 3, the positioning fixing cover plate 18 is arranged in the mounting base 1, then, the two rotary rods 8 are manually rotated simultaneously, because the rotating rod 8 is movably connected with the fixed block 10, the rotating rod 8 rotates to drive the second bevel gear 13 to rotate, due to the meshing fit between the second bevel gear 13 and the first bevel gear 12, the first bevel gear 12 rotates to drive the rotating rod 14 to rotate, so that the threaded rod 16 rotates along with the rotating rod, because the threaded sleeve 17 is in threaded fit with the threaded rod 16, through the sliding fit between the sliding block 7 and the sliding chute 4, the threaded sleeve 17 moves towards two sides on the threaded rod 16, the clamping tongue 6 is pushed to move to the inside of the clamping groove 5, and the electric power cover plate is installed;
then, when in use, when passerby or vehicles pass by the surface of the electric cover plate, the wear-resistant rubber block 21 plays a role in skid resistance and wear resistance, when the wear-resistant rubber block 21 reaches pressure, the wear-resistant rubber block moves downwards, and the movable block 22 moves downwards due to the sliding fit between the movable block 22 and the second cavity 19, so that the return spring 20 is forced to compress, and a buffering effect is achieved;
finally, when a vehicle rolls on the electric cover plate, the movable cover plate 11 is stressed, due to the sliding fit between the movable cover plate 11 and the fixed cover plate 18, the movable cover plate 11 moves downwards to push the movable plate 907 to move downwards, so that the mounting spring 905 at the bottom end of the movable plate 907 is stressed and compressed to play a role in buffering, meanwhile, when the movable plate 907 moves downwards, the hinge rod 904 is pushed, due to the fact that the hinge rod 904 is movably connected with the movable plate 907 and the sleeve 903 through hinges, the hinge rod 904 moves downwards to push the sleeves 903 at two sides, due to the fact that the sliding fit is formed between the sleeve 903 and the mounting rod 906, the sleeve 903 moves upwards on the mounting rod 906, the buffering spring 902 at one side of the sleeve 903 is forced to be compressed to play a role in buffering.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The utility model provides an electric power apron with protective structure, includes mount pad (1), fixed block (10) and thread bush (17), its characterized in that: a fixed cover plate (18) is arranged in the mounting seat (1), a movable cover plate (11) is arranged in the fixed cover plate (18), the top end of the movable cover plate (11) extends to the upper part of the fixed cover plate (18), the bottom end in the mounting seat (1) is provided with a protective structure (9), the inner parts of two sides of the fixed cover plate (18) are both provided with a first cavity (15), one side of the top end of the fixed cover plate (18) is fixedly connected with a fixed block (10), the top end of the movable cover plate (11) is evenly provided with a second cavity (19), and two sides of the bottom end of the second cavity (19) are both provided with a return spring (20), the top end of the return spring (20) is both provided with a movable block (22), the top ends of the movable blocks (22) extend to the top end of the movable cover plate (11), the top ends of the movable blocks (22) are fixedly connected with wear-resistant rubber blocks (21).
2. The electric power cover plate with a protective structure as claimed in claim 1, wherein: constant head tank (2) have all been seted up to the intermediate position department on the inside top of mount pad (1), the equal fixedly connected with locating piece (3) of centre of fixed apron (18) bottom one side, and the bottom of locating piece (3) all extends to the inside of constant head tank (2).
3. The electric power cover plate with a protective structure as claimed in claim 1, wherein: the protection structure is characterized in that a shell (901), a buffer spring (902), a sleeve (903), a hinged rod (904), an installation spring (905), an installation rod (906) and a movable plate (907) are sequentially arranged inside the protection structure (9), the shell (901) is arranged at the bottom inside the installation seat (1), the installation rod (906) is transversely arranged at the bottom inside the shell (901), the installation springs (905) are evenly installed at the top ends inside the shells (901) at two ends of the installation rod (906), the movable plate (907) is installed at the top end of the installation spring (905), and the top end of the movable plate (907) extends to the position below a movable cover plate (11) above the shell (901).
4. The electric power cover plate with a protective structure as claimed in claim 3, wherein: the both sides of installation pole (906) outer wall all are equipped with buffer spring (902), and the outer wall of buffer spring (902) one side installation pole (906) all is equipped with sleeve (903), the both ends of sleeve (903) all have hinge bar (904) through articulated elements swing joint, and the top of hinge bar (904) all through articulated elements swing joint in the bottom of fly leaf (907).
5. The electric power cover plate with a protective structure as claimed in claim 1, wherein: the equal vertical penetration in top of fixed block (10) has swing arm (8), and the bottom of swing arm (8) all extends to the inside of first cavity (15), the equal fixedly connected with second conical gear (13) in bottom of first cavity (15) inside swing arm (8), the inside of first cavity (15) below second conical gear (13) all transversely is provided with bull stick (14), the outer wall of one side bull stick (14) of second conical gear (13) below all overlaps and is equipped with first conical gear (12), the equal fixedly connected with threaded rod (16) in one side of bull stick (14), and the outer wall of threaded rod (16) all overlaps and is equipped with thread bush (17).
6. The electric power cover plate with a protective structure as claimed in claim 5, wherein: spout (4) have all been seted up to one side at first cavity (15) both ends, mounting fixedly connected with slider (7) are all passed through at the both ends of thread bush (17), and the one end of slider (7) all extends to the inside one end of spout (4), draw-in groove (5) have all been seted up to one side that mount pad (1) is close to fixed apron (18), one side fixedly connected with block tongue (6) of first conical gear (12) are kept away from in thread bush (17), and one side of block tongue (6) all extends to the inside of draw-in groove (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011055036.1A CN112343087A (en) | 2020-09-30 | 2020-09-30 | Electric power apron with protective structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011055036.1A CN112343087A (en) | 2020-09-30 | 2020-09-30 | Electric power apron with protective structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112343087A true CN112343087A (en) | 2021-02-09 |
Family
ID=74361380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011055036.1A Pending CN112343087A (en) | 2020-09-30 | 2020-09-30 | Electric power apron with protective structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112343087A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206706620U (en) * | 2017-05-16 | 2017-12-05 | 重庆公共运输职业学院 | A kind of communications and transportation anticollision device, collision-prevention device |
| CN107881984A (en) * | 2017-11-26 | 2018-04-06 | 刘子金 | A kind of combined movable dykes and dams of removable snorkeling |
| CN208123785U (en) * | 2018-04-25 | 2018-11-20 | 安庆师范大学 | It is a kind of for installing the mounting device of electromechanical equipment |
| CN109008130A (en) * | 2018-10-26 | 2018-12-18 | 浙江锦源实业有限公司 | A kind of pull rod box enclosure that shatter-resistant is wear-resisting |
| CN109267819A (en) * | 2018-10-19 | 2019-01-25 | 高立伟 | A kind of road and bridge construction anti-collision alarm guardrail |
| CN208563392U (en) * | 2018-06-26 | 2019-03-01 | 潍坊团共尔机械有限公司 | A kind of split type inspection well cover easy to repair |
| CN209703568U (en) * | 2019-01-28 | 2019-11-29 | 林明选 | Town road local stiffening structure |
-
2020
- 2020-09-30 CN CN202011055036.1A patent/CN112343087A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206706620U (en) * | 2017-05-16 | 2017-12-05 | 重庆公共运输职业学院 | A kind of communications and transportation anticollision device, collision-prevention device |
| CN107881984A (en) * | 2017-11-26 | 2018-04-06 | 刘子金 | A kind of combined movable dykes and dams of removable snorkeling |
| CN208123785U (en) * | 2018-04-25 | 2018-11-20 | 安庆师范大学 | It is a kind of for installing the mounting device of electromechanical equipment |
| CN208563392U (en) * | 2018-06-26 | 2019-03-01 | 潍坊团共尔机械有限公司 | A kind of split type inspection well cover easy to repair |
| CN109267819A (en) * | 2018-10-19 | 2019-01-25 | 高立伟 | A kind of road and bridge construction anti-collision alarm guardrail |
| CN109008130A (en) * | 2018-10-26 | 2018-12-18 | 浙江锦源实业有限公司 | A kind of pull rod box enclosure that shatter-resistant is wear-resisting |
| CN209703568U (en) * | 2019-01-28 | 2019-11-29 | 林明选 | Town road local stiffening structure |
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Application publication date: 20210209 |
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| RJ01 | Rejection of invention patent application after publication |