CN112211283A - Water course pull throughs for municipal works - Google Patents
Water course pull throughs for municipal works Download PDFInfo
- Publication number
- CN112211283A CN112211283A CN202011119686.8A CN202011119686A CN112211283A CN 112211283 A CN112211283 A CN 112211283A CN 202011119686 A CN202011119686 A CN 202011119686A CN 112211283 A CN112211283 A CN 112211283A
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- China
- Prior art keywords
- barrel
- nozzle
- water
- rod
- pipeline
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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
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/10—Wheeled apparatus for emptying sewers or cesspools
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- 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
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- 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
- E03F9/007—Devices providing a flushing surge
Abstract
The invention discloses a municipal engineering water channel dredging device and an implementation method thereof, and the municipal engineering water channel dredging device comprises a barrel body, wherein two ends of the barrel body are provided with a travelling mechanism, the travelling mechanism comprises a base, a rod barrel, a post rod, a spring and a roller, the base is arranged at four ends of the barrel body, the rod barrel is arranged on the base, one end of the post rod is inserted into the rod barrel, the other end of the post rod extends out of the barrel body, the spring is sleeved on the post rod, one end of the spring is in contact connection with the outer side wall of a barrel opening of the rod barrel, and the roller is arranged in a U-shaped port at one end. The water channel dredging device for municipal engineering is applicable to drainage pipelines with different sizes, and has wider application range; because a driving advancing mechanism is not required to be additionally arranged, the whole load is light, the cost is low, the safety of dredging operation can be ensured, and the dredging work efficiency is improved.
Description
Technical Field
The invention relates to the technical field of municipal engineering pipelines, in particular to a water pipeline dredging device for municipal engineering.
Background
With the rapid development of urban construction, urban drainage facilities also become an important basic project for the construction and development of modern cities, and are essential basic facilities for guaranteeing the production and life of citizens. While the drainage facilities are continuously improved, the silting and blocking of municipal drainage pipelines also become common phenomena. Due to the accumulation of sludge in the drainage pipeline and the blockage of leaves and scraps of paper, sewage overflows and water accumulates on the road surface, so that the environment is polluted, the traffic is also hindered, and a great deal of inconvenience is brought to residents.
Disclosure of Invention
The invention aims to provide a municipal engineering water channel dredging device which is suitable for water drainage pipelines with different sizes and has wider application range; because need not to install additional drive advancing mechanism, therefore make whole load light, with low costs, can guarantee the security of mediation operation simultaneously, improve the work efficiency of mediation, can solve the problem that proposes among the above-mentioned background art.
In order to achieve the purpose, the invention provides the following technical scheme: a water channel dredging device for municipal engineering comprises a barrel body, wherein travelling mechanisms are mounted at two ends of the barrel body, each travelling mechanism comprises a base, a rod barrel, a post rod, a spring and a roller wheel, the bases are mounted at four ends of the barrel body, the rod barrels are mounted on the bases, one end of each post rod is inserted into the corresponding rod barrel, the other end of each post rod extends out of the barrel body, the springs are sleeved on the post rods, one ends of the springs are in contact connection with the outer side wall of a barrel opening of the corresponding rod barrel, and the roller wheels are mounted in U-shaped ports at one ends of the post rods; a motor is arranged in the barrel, the output shaft end of the motor is connected with a middle shaft, and one end of the middle shaft penetrates through the top wall of the barrel, extends out of the barrel and is connected with a cutter head; a water conveying pipeline is arranged on the side wall in the barrel, the water inlet end of the water conveying pipeline is communicated with a hose connected with the tail end of the barrel, and the water outlet end of the water conveying pipeline is communicated with a first nozzle and a second nozzle which are arranged on the barrel; the first nozzle is arranged on the outer side wall of the top end of the cylinder body, and the second nozzle is arranged on the outer side wall of the tail end of the cylinder body.
Preferably, the base comprises arc bottom plate, curb plate, screw rod and pinion rack, the cambered surface of arc bottom plate and the section of thick bamboo face phase-match of barrel, the arc bottom plate pastes and covers on the barrel to through the screw fixation, the curb plate is installed in the both ends of arc bottom plate, and the screw sets up on the curb plate, and the screw cartridge is in the screw, and the one end of screw rod extends to the inboard of curb plate, and the pinion rack is installed in the one end of screw rod.
Preferably, the outer side wall of the rod barrel is further provided with tooth grooves, tooth surfaces of the tooth grooves correspond to tooth surfaces of the toothed plates one by one, the rod barrel is inserted into the base, and the screw rod is rotated to enable the toothed plates to be pressed on the tooth grooves.
Preferably, the barrel is further provided with a lead hole, a lead is inserted into the lead hole and sealed by a rubber ring, one end of the lead extends into the barrel and is connected with a power end of the motor, and a waterproof rubber sleeve is sleeved outside the lead.
Preferably, the nozzle of the first nozzle faces the outer side of the cutter disc, and the nozzle of the second nozzle faces the outer side of the tail end of the barrel body.
The invention provides another technical scheme: an implementation method of a municipal engineering water channel dredging device comprises the following steps:
s1: the travelling mechanism is adjusted according to the pipe diameter of the blocked drain pipe, so that when the barrel is placed in the drain pipe, the rollers in the travelling mechanism can be attached to the inner side wall of the drain pipe to roll;
s2: the hose is connected with an external water pump, water flow is injected into a water conveying pipeline in the cylinder body through the water pump, and then the water flow is sprayed out through the first nozzle and the second nozzle;
s3: the blockage crushed by the cutter head can be sprayed and dispersed through the first nozzle, and the device is pushed to move in the pipeline through the reverse acting force generated by the water column sprayed by the second nozzle;
s4: connecting a lead with an external power supply, so that a motor is started to drive a middle shaft to rotate, and further drive a cutter head to rotate at a high speed, and the blockage in the pipeline is crushed and scattered;
s5: after the pipeline is dredged, the water pump is closed and the wire power supply is disconnected, and the hose is slowly pulled, so that the barrel is pulled out of the pipeline, and the dredging operation of the pipeline is completed.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the implementation method of the municipal engineering water channel dredging device, the travelling mechanism can be adjusted according to the pipe diameter of the blocked drain pipe, so that after the barrel is placed in the drain pipe, the roller in the travelling mechanism can be attached to the inner side wall of the drain pipe to roll, the municipal engineering water channel dredging device can be suitable for drain pipes of different sizes, and the application range is wider.
2. The invention provides an implementation method of a municipal engineering water channel dredging device, which is characterized in that a hose is connected with an external water pump, water flow is injected into a water conveying pipeline in a cylinder body through the water pump, and then the water flow is sprayed out through a first nozzle and a second nozzle; the water column sprayed out by the first nozzle sprays and disperses the blockage crushed by the cutter head, so that the crushed blockage is prevented from accumulating on the barrel body, and the weight increase and the advancing of the barrel body are hindered; secondly, through the produced reverse acting force of second nozzle spun water column to thrust unit marchs in the pipeline, avoids installing additional heavy burden and the cost that drive travel mechanism brought additional in the barrel, and the water column spun simultaneously second nozzle spun water column portability is spouted outward to the pipeline and is flowed in order to avoid being detained in the pipeline by the plug of spouting.
3. According to the implementation method of the municipal engineering water channel dredging device, the wire is connected with an external power supply, so that the motor is started to drive the central shaft to rotate, the cutter head is driven to rotate at a high speed, the blockage in the pipeline is smashed and scattered, the blockage is discharged out of the pipeline under the carrying of water flow, and the waterproof rubber sleeve sleeved outside the wire can prevent potential safety hazards caused by electric leakage and improve the safety of the device in the process of dredging the pipeline.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is an assembly view of the traveling mechanism structure of the present invention;
FIG. 3 is an assembly view of the base and barrel structure of the present invention;
fig. 4 is a view showing the internal structure of the cylinder of the present invention.
In the figure: 1. a barrel; 2. a traveling mechanism; 21. a base; 211. an arc-shaped bottom plate; 212. a side plate; 213. a screw hole; 214. a screw; 215. a toothed plate; 22. a barrel; 221. a tooth socket; 23. a post rod; 24. a spring; 25. a roller; 3. a motor; 31. a middle shaft; 4. a cutter head; 5. a water delivery pipeline; 6. a hose; 7. a first nozzle; 8. a second nozzle; 9. a wire hole; 91. a rubber ring; 10. a wire; 11. a waterproof rubber sleeve.
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, a municipal works water course dredging device comprises a cylinder body 1, wherein two ends of the cylinder body 1 are provided with a travelling mechanism 2, the travelling mechanism 2 comprises a base 21, a rod cylinder 22, a post rod 23, a spring 24 and a roller 25, wherein the base 21 is arranged at four ends of the cylinder body 1, the rod cylinder 22 is arranged on the base 21, one end of the post rod 23 is inserted into the rod cylinder 22, the other end of the post rod 23 extends out of the cylinder body 1, the spring 24 is sleeved on the post rod 23, one end of the spring 24 is in contact connection with the outer side wall of the cylinder opening of the rod cylinder 22, and the roller 25 is arranged in a U-shaped port at one end of the post rod 23; a motor 3 is arranged in the cylinder 1, the output shaft end of the motor 3 is connected with a middle shaft 31, and one end of the middle shaft 31 penetrates through the top wall of the cylinder 1, extends out of the cylinder and is connected with a cutter head 4; a water conveying pipeline 5 is arranged on the side wall in the barrel body 1, the water inlet end of the water conveying pipeline 5 is communicated with a hose 6 connected with the tail end of the barrel body 1, and the water outlet end of the water conveying pipeline 5 is communicated with a first nozzle 7 and a second nozzle 8 which are arranged on the barrel body 1; the first nozzle 7 is arranged on the outer side wall of the top end of the cylinder body 1, and the second nozzle 8 is arranged on the outer side wall of the tail end of the cylinder body 1.
The base 21 is composed of an arc-shaped bottom plate 211, a side plate 212, a screw hole 213, a screw rod 214 and a toothed plate 215, wherein the arc-shaped bottom plate 211 can be attached to the cylinder 1 and fixed by screws because the arc surface of the arc-shaped bottom plate 211 is matched with the cylinder surface of the cylinder 1, the side plate 212 is installed at two ends of the arc-shaped bottom plate 211, the screw hole 213 is arranged on the side plate 212, the screw rod 214 is inserted into the screw hole 213, one end of the screw rod 214 extends to the inner side of the side plate 212, and the toothed plate 215 is installed at one end of the screw rod; the outer side wall of the rod barrel 22 is further provided with tooth grooves 221, tooth surfaces of the tooth grooves 221 correspond to tooth surfaces of the tooth plates 215 one by one, the rod barrel 22 is inserted into the base 21, and the screw 214 is rotated to enable the tooth plates 215 to be pressed against the tooth grooves 221.
Make toothed plate 215 break away from or press and cover on the tooth's socket 221 of rod section of thick bamboo 22 through elasticity screw 214 to realize the regulation to rod section of thick bamboo 22, change the depth that rod section of thick bamboo 22 inserted in base 21 with this, and then increase or shorten the distance between gyro wheel 25 and the barrel 1, with the drainage pipe that is applicable to different sizes, enlarge application scope.
The barrel body 1 is further provided with a lead hole 9, a lead wire 10 is inserted in the lead hole 9 and sealed through a rubber ring 91, one end of the lead wire 10 extends into the barrel body 1 and is connected with a power supply end of the motor 3, and a waterproof rubber sleeve 11 is sleeved outside the lead wire 10; through being connected wire 10 and external power source, thereby switch-on motor 3 drives axis 31 and rotates, and then it is high-speed rotatory to drive blade disc 4, utilize rotatory blade disc 4 to stir the plug in the pipeline, break up, and discharge outside the pipeline under carrying of rivers, and the waterproof gum cover 11 of wire 10 overcoat, and under the sealed effect of rubber ring 91, can prevent that wire 10 from leaking electricity or rivers from leading hole 9 entering barrel 1 in causing potential safety hazards such as harm to motor 3, can effectively improve the security of device in dredging pipe process.
The nozzle of the first nozzle 7 faces the outer side of the cutter disc 4, and the nozzle of the second nozzle 8 faces the outer side of the tail end of the barrel 1, so that water columns sprayed by the first nozzle 7 spray broken plugs of the cutter disc 4, and the broken plugs are prevented from accumulating on the barrel 1, so that the weight increase and the advancing of the barrel 1 are hindered; through the produced reverse effort of second nozzle 8 spun water column to thrust unit marchs in the pipeline, avoids installing additional heavy burden and the cost that drive travel mechanism brought additional in barrel 1, and 8 spun water columns portability of second nozzle 8 spun plugs outwards spout the outflow to the pipeline simultaneously, so as to avoid being detained in the pipeline.
In order to better show the implementation process of the municipal engineering water pipe dredging device, the embodiment now provides an implementation method of the municipal engineering water pipe dredging device, which comprises the following steps:
the method comprises the following steps: the running mechanism 2 is adjusted according to the pipe diameter of the blocked drain pipe, so that after the barrel 1 is placed in the drain pipe, the roller 25 in the running mechanism 2 can be attached to the inner side wall of the drain pipe to roll.
Step two: the hose 6 is connected with an external water pump, water flow is injected into the water conveying pipeline 5 in the barrel 1 through the water pump, and then the water flow is sprayed out through the first nozzle 7 and the second nozzle 8.
Step three: the blocking objects crushed by the cutter head 4 can be sprayed out through the first nozzle 7, and the pushing device is pushed to move in the pipeline through the reverse acting force generated by the water column sprayed out through the second nozzle 8.
Step four: the lead 10 is connected with an external power supply, so that the motor 3 is started to drive the middle shaft 31 to rotate, further drive the cutter head 4 to rotate at a high speed, and the blockage in the pipeline is crushed and scattered.
Step five: after the pipeline is dredged, the water pump is turned off, the power supply of the lead 10 is cut off, and the hose 6 is slowly pulled, so that the barrel 1 is pulled out of the pipeline, and the dredging operation of the pipeline is completed.
The implementation method of the municipal engineering water channel dredging device provided by the invention can adjust the travelling mechanism 2 according to the pipe diameter of the blocked drain pipe, so that after the barrel body 1 is arranged in the drain pipe, the roller 25 in the travelling mechanism 2 can be attached to the inner side wall of the drain pipe to roll, and therefore, the municipal engineering water channel dredging device is suitable for drain pipes with different sizes and has a wider application range.
The implementation method of the municipal engineering water channel dredging device provided by the invention comprises the following steps of connecting the hose 6 with an external water pump, injecting water flow into the water conveying pipeline 5 in the barrel body 1 through the water pump, and then spraying the water flow out through the first nozzle 7 and the second nozzle 8; the water column sprayed out by the first nozzle 7 sprays and disperses the plug crushed by the cutter head 4, thereby avoiding the crushed plug from accumulating on the cylinder body 1 and preventing the weight increase and the advancing of the cylinder body 1 from being blocked; secondly, through the produced reverse acting force of the water column of second nozzle 8 spun to thrust unit advances in the pipeline, avoids additional heavy burden and the cost that the drive travel mechanism brought additional in barrel 1, and the water column of second nozzle 8 spun portability simultaneously scatters the jam to the pipeline outward and spouts the outflow, so as to avoid being detained in the pipeline.
According to the implementation method of the municipal engineering water channel dredging device, the wire 10 is connected with an external power supply, so that the motor 3 is started to drive the central shaft 31 to rotate, the cutter head 4 is driven to rotate at a high speed, blockages in the pipeline are crushed and scattered, the blockages are discharged out of the pipeline under the carrying of water flow, the waterproof rubber sleeve 11 sleeved outside the wire 10 can prevent potential safety hazards caused by electric leakage, and the safety of the device in the process of dredging the pipeline is improved.
In summary, the following steps: the municipal engineering water channel dredging device provided by the invention is suitable for drainage pipelines with different sizes, and has a wider application range; because the driving advancing mechanism is not required to be additionally arranged, the whole load is light, the cost is low, the safety of dredging operation can be ensured, the dredging work efficiency is improved, and the problems in the prior art can be effectively solved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (6)
1. The utility model provides a water course pull throughs for municipal works, includes barrel (1), its characterized in that: the walking mechanisms (2) are mounted at two ends of the barrel body (1), each walking mechanism (2) comprises a base (21), a rod barrel (22), a post rod (23), a spring (24) and a roller (25), the bases (21) are mounted at four ends of the barrel body (1), the rod barrels (22) are mounted on the bases (21), one ends of the post rods (23) are inserted into the rod barrels (22), the other ends of the post rods (23) extend out of the barrel body (1), the springs (24) are sleeved on the post rods (23), one ends of the springs (24) are in contact connection with the outer side wall of a barrel opening of the rod barrel (22), and the rollers (25) are mounted in a U-shaped port at one end of the post rods (23); a motor (3) is arranged in the barrel (1), the output shaft end of the motor (3) is connected with a middle shaft (31), and one end of the middle shaft (31) penetrates through the top wall of the barrel (1) to extend out of the barrel and is connected with a cutter head (4); a water conveying pipeline (5) is arranged on the side wall in the barrel body (1), the water inlet end of the water conveying pipeline (5) is communicated with a hose (6) connected with the tail end of the barrel body (1), and the water outlet end of the water conveying pipeline (5) is communicated with a first nozzle (7) and a second nozzle (8) which are arranged on the barrel body (1); the first nozzle (7) is arranged on the outer side wall of the top end of the barrel body (1), and the second nozzle (8) is arranged on the outer side wall of the tail end of the barrel body (1).
2. The municipal works water course dredging device of claim 1, wherein: base (21) comprise arc bottom plate (211), curb plate (212), screw (213), screw rod (214) and pinion rack (215), the cambered surface of arc bottom plate (211) and the tube face phase-match of barrel (1), arc bottom plate (211) are laminated on barrel (1) to through the screw fixation, install in the both ends of arc bottom plate (211) curb plate (212), screw (213) set up on curb plate (212), screw rod (214) cartridge is in screw (213), and the one end of screw rod (214) extends to the inboard of curb plate (212), and pinion rack (215) are installed in the one end of screw rod (214).
3. The municipal works water course dredging device of claim 1, wherein: the outer side wall of the rod cylinder (22) is further provided with tooth grooves (221), tooth surfaces of the tooth grooves (221) correspond to tooth surfaces of the tooth plates (215) one by one, the rod cylinder (22) is inserted into the base (21), and the screw rod (214) is rotated to enable the tooth plates (215) to be pressed on the tooth grooves (221).
4. The municipal works water course dredging device of claim 1, wherein: still set up pin hole (9) on barrel (1), in pin hole (9) interpolation dress wire (10) to sealed through rubber ring (91), the one end of wire (10) extends to in barrel (1) to be connected with the power end of motor (3), wire (10) overcoat dress waterproof gum cover (11).
5. The municipal works water course dredging device of claim 1, wherein: the nozzle of the first nozzle (7) faces the outer side of the cutter head (4), and the nozzle of the second nozzle (8) faces the outer side of the tail end of the barrel body (1).
6. A method of carrying out the municipal works water pipe dredging device according to any one of claims 1 to 5, comprising the steps of:
s1: the travelling mechanism (2) is adjusted according to the pipe diameter of the blocked drain pipe, so that after the barrel (1) is placed in the drain pipe, the roller (25) in the travelling mechanism (2) can be attached to the inner side wall of the drain pipe to roll;
s2: the hose (6) is connected with an external water pump, water flow is injected into the water conveying pipeline (5) in the barrel body (1) through the water pump, and then the water flow is sprayed out through the first nozzle (7) and the second nozzle (8);
s3: the blockage crushed by the cutter head (4) can be sprayed and dispersed through the first nozzle (7), and the device is pushed to move in the pipeline through the reverse acting force generated by the water column sprayed by the second nozzle (8);
s4: connecting a lead (10) with an external power supply, so that a motor (3) is started to drive a middle shaft (31) to rotate, and further drive a cutter head (4) to rotate at a high speed, and therefore reading blockages in a pipeline are crushed and scattered;
s5: after the pipeline is dredged, the water pump is turned off, the power supply of the lead (10) is cut off, and the hose (6) is slowly pulled, so that the barrel (1) is pulled out of the pipeline, and the dredging operation of the pipeline is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011119686.8A CN112211283A (en) | 2020-10-19 | 2020-10-19 | Water course pull throughs for municipal works |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011119686.8A CN112211283A (en) | 2020-10-19 | 2020-10-19 | Water course pull throughs for municipal works |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112211283A true CN112211283A (en) | 2021-01-12 |
Family
ID=74055880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011119686.8A Withdrawn CN112211283A (en) | 2020-10-19 | 2020-10-19 | Water course pull throughs for municipal works |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112211283A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114855986A (en) * | 2022-04-22 | 2022-08-05 | 恒基建设集团有限公司 | Municipal administration pipeline pull throughs |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071942A (en) * | 2010-12-02 | 2011-05-25 | 沈阳重型机械集团有限责任公司 | Processing method for protecting excavation place of shield machine from mudlining |
| CN109610629A (en) * | 2018-12-27 | 2019-04-12 | 宜都市市政工程公司 | Sewage network dredger and dredging method |
| CN210658613U (en) * | 2019-06-19 | 2020-06-02 | 浙江广地建设工程有限公司 | Be applied to municipal drainage pipe's grinding shower nozzle |
| CN111236410A (en) * | 2020-01-15 | 2020-06-05 | 林嘉庆 | Sand conveying pipeline dredging device |
-
2020
- 2020-10-19 CN CN202011119686.8A patent/CN112211283A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071942A (en) * | 2010-12-02 | 2011-05-25 | 沈阳重型机械集团有限责任公司 | Processing method for protecting excavation place of shield machine from mudlining |
| CN109610629A (en) * | 2018-12-27 | 2019-04-12 | 宜都市市政工程公司 | Sewage network dredger and dredging method |
| CN210658613U (en) * | 2019-06-19 | 2020-06-02 | 浙江广地建设工程有限公司 | Be applied to municipal drainage pipe's grinding shower nozzle |
| CN111236410A (en) * | 2020-01-15 | 2020-06-05 | 林嘉庆 | Sand conveying pipeline dredging device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114855986A (en) * | 2022-04-22 | 2022-08-05 | 恒基建设集团有限公司 | Municipal administration pipeline pull throughs |
| CN114855986B (en) * | 2022-04-22 | 2023-10-20 | 恒基建设集团有限公司 | Municipal administration pipeline pull throughs |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20210112 |