CN114960924A - Sewer dredging device for municipal public works construction - Google Patents
Sewer dredging device for municipal public works construction Download PDFInfo
- Publication number
- CN114960924A CN114960924A CN202210729600.6A CN202210729600A CN114960924A CN 114960924 A CN114960924 A CN 114960924A CN 202210729600 A CN202210729600 A CN 202210729600A CN 114960924 A CN114960924 A CN 114960924A
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- Prior art keywords
- fixedly connected
- sliding
- limiting
- rod
- rotating
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- 238000010276 construction Methods 0.000 title claims abstract description 17
- 238000002955 isolation Methods 0.000 claims abstract description 25
- 238000005086 pumping Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000007790 scraping Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims 2
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 5
- 239000003651 drinking water Substances 0.000 description 4
- 235000020188 drinking water Nutrition 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F9/00—Arrangements or fixed installations methods or devices for cleaning or clearing sewer pipes, e.g. by flushing
- E03F9/002—Cleaning sewer pipes by mechanical means
- E03F9/005—Apparatus for simultaneously pushing and rotating a cleaning device carried by the leading end of a cable or an assembly of rods
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a sewer dredging device for municipal public engineering construction, which comprises an isolation shell, wherein the inner surface of the isolation shell is fixedly connected with a servo motor, the output end of the servo motor is fixedly connected with a rotating shaft, the bottom end of the rotating shaft penetrates through the isolation shell and extends to the outside of the isolation shell, the servo motor is arranged in the isolation shell, and a rotating rod on an inclined plate is driven to rotate through the rotation of the servo motor, so that a scraper on the rotating rod is contacted with the inner wall of a pipeline, and oil stain or adhesive stain on the inner wall of the pipeline can be scraped through the structure.
Description
Technical Field
The invention relates to the technical field of sewer dredging, in particular to a sewer dredging device for municipal public engineering construction.
Background
Along with the continuous improvement of people's standard of living, city construction is also bigger and bigger, wherein pipeline construction is a main content of municipal work, and the pipeline laying volume of a city is not inferior to the work load of building, but along with the increase of pipeline laying quantity, also expose a lot of problems, such as many pipelines because the existence of intraductal filth, the jam condition takes place very easily, therefore pipeline dredging work has consumed a large amount of manpower and materials, and work efficiency is very low moreover.
Chinese patent provides a sewer dredging device (publication number: CN216130332U) for municipal engineering, which realizes the dispersion of blockages in a sewer by dividing the blockages in the sewer through a dredging blade cylinder, and effectively improves the dredging effect of the device on the sewer.
Disclosure of Invention
The invention aims to provide a sewer dredging device for municipal public works construction, which solves the following technical problems:
the purpose of the invention can be realized by the following technical scheme:
the utility model provides a sewer pull throughs for municipal administration public works construction, includes the separation shell, the internal surface fixedly connected with servo motor of separation shell, servo motor's output fixedly connected with axis of rotation, the bottom of axis of rotation runs through the separation shell and extends to the outside of separation shell, the bottom fixedly connected with fixed plate of axis of rotation, equal fixedly connected with swash plate all around of fixed plate bottom, the one end of swash plate is rotated and is connected with the dwang, the surface of axis of rotation is provided with the slip cap, the surface of slip cap is provided with a plurality of turning block, the internal surface rotation of turning block is connected with the connecting rod, the one end of connecting rod is provided with the slide bar, the one end rotation of slide bar is connected with the sliding block that is used for the pulling dwang, the pot head of dwang is equipped with the scraper blade.
As a further scheme of the invention: the outer surface of the rotating shaft is fixedly connected with a plurality of limiting strips, the inner surface of the sliding sleeve is provided with a limiting groove, and the inner surface of the limiting groove is matched with the outer surfaces of the limiting strips.
As a further scheme of the invention: the ladder groove has been seted up to one side of dwang, the internal surface in ladder groove and the surface sliding connection of sliding block, the slip chamber has been seted up to the one end of connecting rod, the surface of slide bar and the internal surface sliding connection in slip chamber, one side fixedly connected with spring in slip chamber inner chamber, the one end of spring and the one end fixed connection of slide bar.
As a further scheme of the invention: the bottom fixedly connected with swivel becket of isolation shell, the equal sliding connection in both sides of swivel becket internal surface has the rotor plate, the bottom fixedly connected with electric telescopic handle of rotor plate, the surface sliding connection of connecting rod has the removal cover, the surface of removing the cover is connected with electric telescopic handle's output through the round pin axle rotation.
As a further scheme of the invention: the connecting hole has been seted up to one side of scraper blade, the through-hole has been seted up on the surface of dwang, the internal surface of through-hole is provided with spacing post, the equal fixedly connected with stopper in both sides of through-hole inner wall, the ring channel has been seted up to the surface of spacing post, the spout has all been seted up to the both sides on spacing post surface, the internal surface of spout and the surface looks adaptation of stopper.
As a further scheme of the invention: the two sides of the isolation shell are fixedly connected with mounting sleeves, and the inner surfaces of the mounting sleeves are fixedly connected with water pumping pipes.
As a further scheme of the invention: and the top of the isolation shell is fixedly connected with a connecting wire pipe.
As a further scheme of the invention: the surface of the connecting rod is arranged in a T shape.
The invention has the beneficial effects that:
(1) according to the invention, the servo motor is arranged in the isolation shell, and the rotating rod on the inclined plate is driven to rotate through the rotation of the servo motor, so that the scraper plate on the rotating rod is in contact with the inner wall of the pipeline, and oil stains or adhesive stains on the inner wall of the pipeline can be scraped through the structure.
(2) According to the invention, the sliding sleeve capable of sliding up and down is arranged on the surface of the rotating shaft, the connecting rod capable of rotating on the rotating block is utilized, and the sliding connection relation between the sliding block on the sliding rod and the stepped groove is matched, so that when the electric telescopic rod extends, the sliding rod in the connecting rod can be pushed to extend, and the rotating rod rotates, so that the equipment can adapt to pipelines with different diameters, and the practicability and the application range of the equipment are improved.
(3) According to the scraper blade, the through hole is formed in the rotating rod in a penetrating mode, the two limiting blocks are arranged in the through hole, the limiting columns in the connecting holes are matched, when the limiting blocks are located in the annular groove and staggered with the sliding groove, the scraper blade can be fixed on the rotating rod by means of the damping relation between the limiting blocks and the annular groove, when the scraper blade needs to be detached, the limiting blocks can slide out of the sliding groove only by rotating the limiting columns, the scraper blade can be detached, the scraper blade is simple in structure, cutter heads with different functions can be replaced, and the application range of the scraper blade is further widened.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the internal structure of the whole body of the present invention;
FIG. 2 is a schematic view of the fitting structure of the rotating shaft and the sliding sleeve in the present invention;
FIG. 3 is a schematic view showing the internal structure of a rotating lever according to the present invention;
FIG. 4 is an enlarged view of the structure of portion A of FIG. 3 according to the present invention:
FIG. 5 is a schematic view of the external structure of the spacing post of the present invention.
In the figure: 1. an insulating shell; 2. a servo motor; 3. a rotating shaft; 4. a fixing plate; 5. a sloping plate; 6. rotating the rod; 7. a sliding sleeve; 8. rotating the block; 9. a connecting rod; 10. a slide bar; 11. a slider; 12. a limiting strip; 13. a limiting groove; 14. moving the sleeve; 15. a sliding cavity; 16. a spring; 17. a stepped groove; 18. a rotating ring; 19. a rotating plate; 20. an electric telescopic rod; 21. a squeegee; 22. a limiting column; 23. connecting holes; 24. a limiting block; 25. a through hole; 26. an annular groove; 27. a chute; 28. connecting a wire pipe; 29. installing a sleeve; 30. a water pumping pipe.
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 to 5, the invention relates to a sewer dredging device for municipal public works construction, which comprises an isolation shell 1, wherein a servo motor 2 is fixedly connected to the inner surface of the isolation shell 1, the output end of the servo motor 2 is fixedly connected with a rotating shaft 3, the bottom end of the rotating shaft 3 penetrates through the isolation shell 1 and extends to the outside of the isolation shell 1, the bottom end of the rotating shaft 3 is fixedly connected with a fixed plate 4, the periphery of the bottom of the fixed plate 4 is fixedly connected with an inclined plate 5, one end of the inclined plate 5 is rotatably connected with a rotating rod 6, the outer surface of the rotating shaft 3 is provided with a sliding sleeve 7, the outer surface of the sliding sleeve 7 is provided with a plurality of rotating blocks 8, the inner surfaces of the rotating blocks 8 are rotatably connected with a connecting rod 9, the surface of the connecting rod 9 is arranged in a T shape, one end of the connecting rod 9 is provided with a sliding rod 10, the one end of slide bar 10 is rotated and is connected with sliding block 11 that is used for spurring dwang 6, the pot head of dwang 6 is equipped with scraper blade 21, sets up servo motor 2 through the inside at cage 1, and the dwang 6 on the rotation through servo motor 2 drives swash plate 5 rotates to make scraper blade 21 on the dwang 6 contact with the inner wall of pipeline, can scrape greasy dirt or the adhesion spot on the pipeline inner wall down through this structure, this structure is comparatively simple, and it is comparatively convenient to operate moreover, easily promotes.
Referring to fig. 2, the outer surface of the rotating shaft 3 is fixedly connected with a plurality of limiting strips 12, the inner surface of the sliding sleeve 7 is provided with a limiting groove 13, the inner surface of the limiting groove 13 is matched with the outer surface of the limiting strips 12, and the sliding sleeve 7 and the rotating shaft 3 can be prevented from slipping through the matching relationship between the limiting strips 12 on the rotating shaft 3 and the limiting grooves 13.
Referring to fig. 3, a stepped groove 17 is formed in one side of the rotating rod 6, an inner surface of the stepped groove 17 is slidably connected to an outer surface of the sliding block 11, a sliding cavity 15 is formed in one end of the connecting rod 9, an outer surface of the sliding rod 10 is slidably connected to an inner surface of the sliding cavity 15, a spring 16 is fixedly connected to one side of an inner cavity of the sliding cavity 15, the spring 16 is used for pushing the sliding rod 10 to slide on the inner surface of the sliding cavity 15, and one end of the spring 16 is fixedly connected to one end of the sliding rod 10.
The bottom fixedly connected with swivel becket 18 of isolation shell 1, the equal sliding connection in both sides of swivel becket 18 internal surface has rotor plate 19, the bottom fixedly connected with electric telescopic handle 20 of rotor plate 19 through setting up swivel becket 18, can make electric telescopic handle 20 follow the rotation of axis of rotation 3 and rotate, the surface sliding connection of connecting rod 9 has removal cover 14, the surface of removal cover 14 is connected with the output rotation of electric telescopic handle 20 through the round pin axle, through set up gliding sliding sleeve 7 from top to bottom in the surface of axis of rotation 3, utilize the connecting rod 9 that can rotate on rotor block 8, the sliding connection relation between sliding block 11 and the ladder groove 17 on the relegate sliding rod 10, when electric telescopic handle 20 extends, can promote the sliding rod 10 in the connecting rod 9 and extend to make dwang 6 rotate, so that this equipment can adapt to the pipeline of different diameters to when a plurality of dwang 6 is in the shrink state, can make the inside of the entering pipeline that the device can be smooth, can prevent this equipment when will getting into the inside of pipeline, scrape the spot of pipeline inner wall in order to drop to the depths of pipeline, cause the phenomenon of jam once more, and then improve the practicality of this equipment, and application scope.
Referring to fig. 4 and 5, a connecting hole 23 is formed in one side of the scraper 21, a through hole 25 is formed in the surface of the rotating rod 6, a limiting post 22 is arranged on the inner surface of the through hole 25, limiting blocks 24 are fixedly connected to both sides of the inner wall of the through hole 25, an annular groove 26 is formed in the outer surface of the limiting post 22, the limiting blocks 24 have certain damping when sliding on the inner surface of the annular groove 26, the limiting post 22 can be prevented from sliding freely, sliding grooves 27 are formed in both sides of the surface of the limiting post 22, the inner surface of the sliding grooves 27 is matched with the outer surface of the limiting blocks 24, the through hole 25 is formed in the rotating rod 6, two limiting blocks 24 are arranged in the through hole 25, the limiting posts 22 in the connecting hole 23 are matched, when the limiting blocks 24 are located in the annular groove 26 and the limiting blocks 24 are staggered with the sliding grooves 27, by utilizing the damping relationship between the limiting blocks 24 and the annular groove 26, can fix scraper blade 21 on dwang 6, and when needing to dismantle, rotate spacing post 22 for stopper 24 takes place to slide at the internal surface of ring channel 26, and aligns stopper 24 and spout 27, then takes out spacing post 22, can dismantle, and this structure is comparatively simple, can realize changing the tool bit of different effects moreover, further improves its application scope.
The equal fixedly connected with installation cover 29 in both sides of isolation shell 1, the internal surface fixedly connected with drinking-water pipe 30 of installation cover 29, this drinking-water pipe 30 communicates with the pump material end of the outside pump material, can collect the greasy dirt and the adhesion nature object of scraping down to the orientation in drinking-water pipe 30 bottom can be adjusted for bellows in the bottom of this drinking-water pipe 30.
The top of the isolation shell 1 is fixedly connected with a connecting wire tube 28, and an electric wire electrically connected with the servo motor 2 and the electric telescopic rod 20 is arranged inside the connecting wire tube 28.
The working principle of the invention is as follows: firstly, the water pumping pipe 30 is communicated with an external material pumping pump, then the isolation shell 1 is pulled through the connecting pipe 28, then the isolation shell 1 and the rotating rod 6 are placed into a pipeline to be dredged, the servo motor 2 is started to rotate through an external controller, so as to drive the rotating shaft 3 to rotate, meanwhile, the rotating rod 6 on the inclined plate 5 also rotates along with the rotation of the rotating shaft 3, the rotating plate 19 on the electric telescopic rod 20 is further driven to rotate on the inner surface of the rotating ring 18, when the isolation shell 1 sinks to a certain position, the electric telescopic rod 20 is started to extend, so that the sliding sleeve 7 slides downwards on the outer surface of the rotating shaft 3, meanwhile, the connecting rod 9 on the inner surface of the rotating block 8 rotates, the spring 16 in the inner cavity of the sliding cavity 15 pushes the sliding rod 10 to slide on the inner surface of the sliding cavity 15, and the rotating rod 6 rotates on the inclined plate 5 by pushing the sliding block 11, the sliding block 11 slides in the stepped groove 17 on the rotating rod 6, because the rotating rod 9 and the moving sleeve 14 on the surface of the extended connecting rod 9 of the electric telescopic rod 20 slide, and the connecting rod 9 and the output end of the electric telescopic rod 20 rotate, the rotating rod 6 is unfolded, so that the scraping plate 21 on the rotating rod 6 is in contact with the inner wall of the pipeline, at this time, the rotation of the isolation shell 1 drives the rotating shaft 3 to rotate, so that the rotating rod 6 rotates, further the scraping plate 21 can scrape off oil stains and adhesive objects on the inner wall, then the external material pump is started, and the stains scraped off from the inner wall of the pipeline are pumped out through the water pumping pipe 30;
when the scraper 21 that plays crushing effect needs to be changed, spacing post 22 is through rotating this moment for stopper 24 takes place to slide at the internal surface of ring channel 26, and align stopper 24 and spout 27, then take out spacing post 22, then overlap the stripping and slicing and cover on dwang 6, then insert the inside of through-hole 25 with spacing post 22, and through making stopper 24 be located the inside of ring channel 26, then rotate spacing post 22 with spout 27 stagger with stopper 24 can.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (8)
1. The utility model provides a sewer pull throughs for municipal administration public works construction, includes isolation shell (1), the internal surface fixedly connected with servo motor (2) of isolation shell (1), its characterized in that, the output fixedly connected with axis of rotation (3) of servo motor (2), the bottom of axis of rotation (3) runs through isolation shell (1) and extends to the outside of isolation shell (1), the bottom fixedly connected with fixed plate (4) of axis of rotation (3), equal fixedly connected with swash plate (5) all around of fixed plate (4) bottom, the one end of swash plate (5) is rotated and is connected with dwang (6), the surface of axis of rotation (3) is provided with sliding sleeve (7), the surface of sliding sleeve (7) is provided with a plurality of turning block (8), the internal surface rotation of turning block (8) is connected with connecting rod (9), the one end of connecting rod (9) is provided with slide bar (10), the one end of slide bar (10) is rotated and is connected with sliding block (11) that are used for spurring dwang (6), the pot head of dwang (6) is equipped with scraper blade (21).
2. The sewer dredging device for municipal and public works construction according to claim 1, wherein a plurality of limiting strips (12) are fixedly connected to the outer surface of the rotating shaft (3), a limiting groove (13) is formed in the inner surface of the sliding sleeve (7), and the inner surface of the limiting groove (13) is matched with the outer surface of each limiting strip (12).
3. The sewer dredging device for municipal and public works construction according to claim 2, wherein one side of the rotating rod (6) is provided with a stepped groove (17), the inner surface of the stepped groove (17) is slidably connected with the outer surface of the sliding block (11), one end of the connecting rod (9) is provided with a sliding cavity (15), the outer surface of the sliding rod (10) is slidably connected with the inner surface of the sliding cavity (15), one side of the inner cavity of the sliding cavity (15) is fixedly connected with a spring (16), and one end of the spring (16) is fixedly connected with one end of the sliding rod (10).
4. The sewer dredging device for municipal utility construction according to claim 3, wherein a rotating ring (18) is fixedly connected to the bottom of the isolation shell (1), rotating plates (19) are slidably connected to both sides of the inner surface of the rotating ring (18), an electric telescopic rod (20) is fixedly connected to the bottom end of each rotating plate (19), a moving sleeve (14) is slidably connected to the outer surface of the connecting rod (9), and the surface of each moving sleeve (14) is rotatably connected with the output end of the electric telescopic rod (20) through a pin shaft.
5. The sewer dredging device for municipal and public works construction according to claim 4, wherein one side of the scraping plate (21) is provided with a connecting hole (23), the surface of the rotating rod (6) is provided with a through hole (25), both sides of the inner wall of the through hole (25) are fixedly connected with limiting blocks (24), the inner surface of the through hole (25) is provided with a limiting column (22), the outer surface of the limiting column (22) is provided with an annular groove (26), both sides of the surface of the limiting column (22) are provided with sliding grooves (27), and the inner surface of the sliding groove (27) is matched with the outer surface of the limiting block (24).
6. The sewer dredging device for municipal utility construction according to claim 5, wherein both sides of the insulation shell (1) are fixedly connected with mounting sleeves (29), and the inner surfaces of the mounting sleeves (29) are fixedly connected with water pumping pipes (30).
7. The sewer dredging device for municipal utility construction according to claim 6, wherein a connecting line pipe (28) is fixedly connected to the top of the insulation casing (1).
8. The sewer dredging device for municipal utility construction according to claim 7, wherein the surface of the connecting rod (9) is T-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210729600.6A CN114960924B (en) | 2022-06-24 | 2022-06-24 | Sewer dredging device for municipal public engineering construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210729600.6A CN114960924B (en) | 2022-06-24 | 2022-06-24 | Sewer dredging device for municipal public engineering construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114960924A true CN114960924A (en) | 2022-08-30 |
| CN114960924B CN114960924B (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210729600.6A Active CN114960924B (en) | 2022-06-24 | 2022-06-24 | Sewer dredging device for municipal public engineering construction |
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| Country | Link |
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| CN (1) | CN114960924B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200087910A1 (en) * | 2019-09-06 | 2020-03-19 | Guozhong Wang | Urban sewer dredging apparatus |
| CN211341121U (en) * | 2019-12-16 | 2020-08-25 | 李幸福 | A sewer scrubbing equipment for municipal administration public works |
| JP6753013B1 (en) * | 2019-08-09 | 2020-09-09 | 广州克力労保用品有限公司 | Urban sewerage communication equipment |
| CN211817129U (en) * | 2020-01-13 | 2020-10-30 | 筠连县鸿基建筑有限公司 | External wall panel for assembly type building |
| US20200384512A1 (en) * | 2017-05-11 | 2020-12-10 | China University Of Mining And Technology | Single-drive bidirectional-crawling pipe-cleaning robot |
| CN216739994U (en) * | 2022-02-15 | 2022-06-14 | 江阴市锦泽建设工程有限公司 | Municipal pipeline pull throughs |
-
2022
- 2022-06-24 CN CN202210729600.6A patent/CN114960924B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200384512A1 (en) * | 2017-05-11 | 2020-12-10 | China University Of Mining And Technology | Single-drive bidirectional-crawling pipe-cleaning robot |
| JP6753013B1 (en) * | 2019-08-09 | 2020-09-09 | 广州克力労保用品有限公司 | Urban sewerage communication equipment |
| US20200087910A1 (en) * | 2019-09-06 | 2020-03-19 | Guozhong Wang | Urban sewer dredging apparatus |
| CN211341121U (en) * | 2019-12-16 | 2020-08-25 | 李幸福 | A sewer scrubbing equipment for municipal administration public works |
| CN211817129U (en) * | 2020-01-13 | 2020-10-30 | 筠连县鸿基建筑有限公司 | External wall panel for assembly type building |
| CN216739994U (en) * | 2022-02-15 | 2022-06-14 | 江阴市锦泽建设工程有限公司 | Municipal pipeline pull throughs |
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| Publication number | Publication date |
|---|---|
| CN114960924B (en) | 2024-02-09 |
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