CN116043770B - A temporary flood embankment for water conservancy projects that is easy to assemble - Google Patents
A temporary flood embankment for water conservancy projects that is easy to assemble Download PDFInfo
- Publication number
- CN116043770B CN116043770B CN202310197867.XA CN202310197867A CN116043770B CN 116043770 B CN116043770 B CN 116043770B CN 202310197867 A CN202310197867 A CN 202310197867A CN 116043770 B CN116043770 B CN 116043770B
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- Prior art keywords
- flood
- transmission shaft
- fixedly connected
- embedded
- chain wheels
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
- E02B3/106—Temporary dykes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
-
- 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
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
Abstract
本发明公开了一种便于装配的水利工程临时防洪堤，其技术方案是：包括防洪堤本体，防洪堤本体内部嵌设有传动轴，传动轴顶端延伸至防洪堤本体顶部外侧，防洪堤本体底部开设有活动槽，活动槽套设在传动轴外侧，活动槽内部嵌设有多个转轴，多个转轴底端均延伸至防洪堤本体底部外侧，防洪堤本体顶部开设有两个进料口，多个转轴底端均固定连接有螺纹杆，多个螺纹杆外侧均套设有套筒，多个套筒底部均固定连接有钻头，多个钻头内部均嵌设有多个支撑条，多个支撑条顶部固定连接有挡板，多个支撑条底部均延伸至钻头外侧，本发明的有益效果是：本装置提高了水利工程施工防洪的效率，同时本装置便于使用者移动和使用，给使用者带来极大的便捷。
The present invention discloses a temporary flood embankment for water conservancy projects which is easy to assemble. The technical scheme is as follows: it comprises a flood embankment body, a transmission shaft is embedded in the flood embankment body, the top end of the transmission shaft extends to the outside of the top of the flood embankment body, a movable groove is provided at the bottom of the flood embankment body, the movable groove is sleeved on the outside of the transmission shaft, a plurality of rotating shafts are embedded in the movable groove, the bottom ends of the plurality of rotating shafts extend to the outside of the bottom of the flood embankment body, two feed ports are provided at the top of the flood embankment body, the bottom ends of the plurality of rotating shafts are fixedly connected with threaded rods, the outsides of the plurality of threaded rods are sleeved with sleeves, the bottoms of the plurality of sleeves are fixedly connected with drill bits, the interiors of the plurality of drill bits are embedded with a plurality of support bars, the tops of the plurality of support bars are fixedly connected with baffles, and the bottoms of the plurality of support bars extend to the outside of the drill bits. The beneficial effects of the present invention are as follows: the present invention improves the efficiency of flood control in water conservancy project construction, and at the same time the present invention is easy for users to move and use, bringing great convenience to users.
Description
Technical Field
The invention relates to the technical field of hydraulic engineering flood control, in particular to a hydraulic engineering temporary flood control dike convenient to assemble.
Background
Flood control is to research and take various countermeasures and measures according to flood rules and flood characteristics so as to prevent or reduce flood disasters and ensure water conservancy work of social and economic development. The basic working contents of the system include flood control planning, flood control construction, management and application of flood control engineering, flood control, flood scheduling and arrangement, post-disaster recovery reconstruction and the like. Flood control measures include engineering measures and non-engineering measures. Flood control is also an important major discipline in water conservancy science.
When current hydraulic engineering is under construction and is administered, need use interim flood control dyke to carry out flood control and handle, but because current interim flood control dyke general weight is great, is difficult to remove, current flood control dyke does not have fixed effect of gripping simultaneously, and water flow is big probably to lead to the flood control dyke to take place to remove to influence the use of flood control dyke.
Disclosure of Invention
Therefore, the invention provides the hydraulic engineering temporary flood bank convenient to assemble, when a user needs to use the flood bank, the flood bank body is placed at a construction position, the knob is screwed to rotate, the knob rotates to drive the sleeves to move downwards, so that the drill bits are embedded into soil, the flood bank body is fixedly installed, after the flood bank is completely fixed, the counterweight sand bags are placed from the two feeding holes, the counterweight sand bags enable the lifting plate and the baffle to move downwards, the support bars deform, the support bars extend outwards and are deeply buried in the soil, and the fixing effect is better, so that the problem that the existing flood bank does not have a fixing and gripping effect is solved.
In order to achieve the aim, the hydraulic engineering temporary flood bank convenient to assemble comprises a flood bank body, wherein a transmission shaft is embedded in the flood bank body, the top end of the transmission shaft extends to the outer side of the top of the flood bank body, a movable groove is formed in the bottom of the flood bank body, the movable groove is sleeved on the outer side of the transmission shaft, a plurality of rotating shafts are embedded in the movable groove, the bottom ends of the rotating shafts extend to the outer side of the bottom of the flood bank body, and two feeding inlets are formed in the top of the flood bank body;
A plurality of equal fixedly connected with threaded rod in pivot bottom, a plurality of equal cover in threaded rod outside is equipped with the sleeve, and is a plurality of equal fixedly connected with drill bit in sleeve bottom, a plurality of the inside all inlaying of drill bit is equipped with a plurality of support bars, and is a plurality of support bar top fixedly connected with baffle, a plurality of support bar bottom all extends to the drill bit outside, and is a plurality of the baffle top all is equipped with the bull stick, and is a plurality of the bull stick runs through a plurality of threaded rods and pivot respectively and extends to the flood control dyke body inside, a plurality of safety covers of equal fixedly connected with in flood control dyke body outside, two lifter plates are inlayed to the flood control dyke body inside, and a plurality of the lifter plates overlaps respectively and establishes in a plurality of bull sticks outsides.
Preferably, a plurality of first chain wheels are embedded in the movable groove, and the first chain wheels are fixedly sleeved on the outer side of the transmission shaft respectively.
Preferably, a plurality of second chain wheels are embedded in the movable groove, a plurality of second chain wheels are fixedly sleeved outside a plurality of rotating shafts respectively, a plurality of first chain wheels and second chain wheels are sleeved outside chains, and the first chain wheels and the second chain wheels are connected through chain driving.
Preferably, a plurality of baffle bottoms are all fixedly connected with telescopic link, and a plurality of telescopic link outsides are all overlapped and are equipped with first spring.
Preferably, two lifting plate bottoms all are equipped with the second spring, and a plurality of the second spring is all inlayed and is established in the flood control dyke body is inside.
Preferably, a plurality of rotating rods are connected with the lifting plate through threads.
Preferably, a plurality of sliding grooves are formed in the threaded rods, a plurality of sliding blocks are embedded in the sliding grooves, and the sliding blocks are fixedly sleeved on the outer sides of the rotating rods respectively.
Preferably, a plurality of bull sticks respectively pass through antifriction bearing swing joint with a plurality of baffles, a plurality of threaded rod respectively pass through threaded connection with a plurality of sleeves, a plurality of lifter plate respectively with flood control dyke body sliding connection.
Preferably, the knob is fixedly connected to the top end of the transmission shaft, the transmission shaft is movably connected with the flood control dike body through a rolling bearing, and the rotating shafts are movably connected with the flood control dike body through rolling bearings.
Preferably, the bottom of the flood control dike body is fixedly connected with a plurality of limit rods, and a plurality of limit rods respectively extend into a plurality of sleeves.
The beneficial effects of the invention are as follows:
1. According to the invention, when a user needs to use the flood bank, the flood bank body is placed at a construction position, the knob is screwed to rotate, the knob rotates to drive the sleeves to move downwards, so that the drill bits are embedded into the soil, the flood bank body is fixedly installed, after the flood bank body is completely fixed, the counterweight sand bags are placed from the two feed inlets, the lifting plate and the baffle are moved downwards by the counterweight sand bags, so that the support bars are deformed, the support bars are outwards extended and are deeply embedded into the soil, the fixing effect is better, the problem that the existing flood bank does not have a fixing and gripping effect is solved, the device improves the flood-preventing efficiency of hydraulic engineering construction, meanwhile, the device is convenient for the user to move and use, brings great convenience to the user, and improves the engineering benefit;
2. In addition, this device is put in the counter weight sand bag through the user with inside, and counter weight sand bag is convenient to carry out the counter weight to the flood control dyke body for flood control dyke body weight increases, makes overall structure more stable, and a plurality of counter weight sand bags of on the other hand push down the lifter plate, make a plurality of support bars take place deformation, thereby make a plurality of support bars outwards extend, in the deep-going soil for fixed effect is better, makes the work efficiency greatly increased of flood control dyke body, brings very big income for the user.
Drawings
FIG. 1 is a schematic view of the overall structure provided by the present invention;
FIG. 2 is a front view cross-section provided by the present invention;
FIG. 3 is a side view cross-section provided by the present invention;
FIG. 4 is an enlarged view of the portion A of FIG. 3 provided by the present invention;
FIG. 5 is an enlarged view of portion B of FIG. 3 provided by the present invention;
FIG. 6 is a schematic perspective view of a shaft and a shaft according to the present invention;
In the figure, a flood control dike body 1, a transmission shaft 2, a movable groove 3, a rotating shaft 4, a feeding port 5, a threaded rod 6, a sleeve 7, a drill bit 8, a supporting bar 9, a baffle 10, a rotating rod 11, a protective cover 12, a lifting plate 13, a first sprocket 14, a second sprocket 15, a chain 16, a telescopic rod 17, a first spring 18, a second spring 19, a sliding chute 20, a sliding block 21, a knob 22 and a limiting rod 23 are arranged.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
Referring to fig. 1-6, the hydraulic engineering temporary flood bank convenient to assemble provided by the invention comprises a flood bank body 1, wherein a transmission shaft 2 is embedded in the flood bank body 1, the top end of the transmission shaft 2 extends to the outer side of the top of the flood bank body 1, a movable groove 3 is formed in the bottom of the flood bank body 1, the movable groove 3 is sleeved on the outer side of the transmission shaft 2, a plurality of rotating shafts 4 are embedded in the movable groove 3, the bottom ends of the rotating shafts 4 extend to the outer side of the bottom of the flood bank body 1, and two feed inlets 5 are formed in the top of the flood bank body 1;
The bottom ends of the rotating shafts 4 are fixedly connected with threaded rods 6, sleeves 7 are sleeved outside the threaded rods 6, drill bits 8 are fixedly connected to the bottoms of the sleeves 7, a plurality of supporting rods 9 are embedded inside the drill bits 8, baffle plates 10 are fixedly connected to the tops of the supporting rods 9, the bottoms of the supporting rods 9 extend to the outer sides of the drill bits 8, rotating rods 11 are arranged at the tops of the baffle plates 10, the rotating rods 11 penetrate through the threaded rods 6 and the rotating shafts 4 respectively and extend to the inner sides of the flood bank body 1, a plurality of protective covers 12 are fixedly connected to the outer sides of the flood bank body 1, two lifting plates 13 are embedded inside the flood bank body 1, and the lifting plates 13 are sleeved outside the rotating rods 11 respectively;
In this embodiment, when a user needs to use the flood bank, the flood bank body 1 is placed at a construction position, the knob 22 is screwed to rotate, the knob 22 rotates to drive the transmission shaft 2 to rotate, the transmission shaft 2 rotates to drive the first sprockets 14 and the second sprockets 15 to rotate, the second sprockets 15 rotates to drive the rotating shafts 4 and the threaded rods 6 to rotate, the threaded rods 6 rotate to drive the sleeves 7 to move downwards, the sleeves 7 move downwards to drive the drill bits 8 to move downwards, so that the drill bits 8 are deeply buried in the soil, the flood bank body 1 is fixedly installed, after the flood bank body is completely fixed, the balance weight sand bags are placed from the two feed inlets 5, the balance weight sand bags enable the lifting plate 13 and the rotating rods 11 to move downwards, the rotating rods 11 move downwards to drive the baffle plates 10 to move downwards, the baffle plates 10 move downwards to squeeze the support bars 9, the support bars 9 deform, the support bars 9 extend outwards and are deeply buried in the soil, and the fixing effect is better;
The device is realized by adopting the following technical scheme that a plurality of first chain wheels 14 are embedded in a movable groove 3, the plurality of first chain wheels 14 are respectively and fixedly sleeved outside a transmission shaft 2, a plurality of second chain wheels 15 are embedded in the movable groove 3, the plurality of second chain wheels 15 are respectively and fixedly sleeved outside a plurality of rotating shafts 4, chains 16 are respectively sleeved outside the plurality of first chain wheels 14 and the plurality of second chain wheels 15, the first chain wheels 14 and the second chain wheels 15 are in driving connection through the chains 16, and the plurality of first chain wheels 14 and the plurality of second chain wheels 15 provide transmission force for the plurality of rotating shafts 4, so that the whole structure is more stable;
The device is realized by adopting the following technical scheme that the bottoms of a plurality of baffle plates 10 are fixedly connected with telescopic rods 17, the outer sides of the telescopic rods 17 are sleeved with first springs 18, the bottoms of two lifting plates 13 are respectively provided with a second spring 19, and the second springs 19 are embedded in a flood control dike body 1;
In order to achieve the limiting purpose, the device is realized by adopting the following technical scheme that sliding grooves 20 are formed in the threaded rods 6, sliding blocks 21 are embedded in the sliding grooves 20, the sliding blocks 21 are fixedly sleeved on the outer sides of the rotating rods 11 respectively, a plurality of limiting rods 23 are fixedly connected to the bottom of the flood bank body 1, the limiting rods 23 extend into the sleeves 7 respectively, the sliding blocks 21 and the sliding grooves 20 limit the rotating rods 11, so that the rotating rods 11 can rotate along with the rotating shafts 4 and can stably move downwards;
In order to achieve the purpose of connection, the device is achieved through the following technical scheme that a plurality of rotating rods 11 are respectively and movably connected with a plurality of baffle plates 10 through rolling bearings, a plurality of threaded rods 6 are respectively and movably connected with a plurality of sleeves 7 through threads, a plurality of lifting plates 13 are respectively and slidably connected with a flood bank body 1, a knob 22 is fixedly connected to the top end of a transmission shaft 2, the transmission shaft 2 is movably connected with the flood bank body 1 through the rolling bearings, a plurality of rotating shafts 4 are movably connected with the flood bank body 1 through the rolling bearings, and the rolling bearings are movably connected to enable rotation of all joints to be smooth.
When a user needs to use the flood bank, the flood bank body 1 is placed at a construction position, the knob 22 is screwed to rotate, the knob 22 rotates to drive the transmission shaft 2 to rotate, the transmission shaft 2 rotates to drive the first chain wheels 14 and the second chain wheels 15 to rotate, the second chain wheels 15 rotates to drive the rotating shafts 4 and the threaded rods 6 to rotate, the threaded rods 6 rotate to drive the sleeves 7 to move downwards, the sleeves 7 move downwards to drive the drill bits 8 to move downwards, so that the drill bits 8 are deeply buried in the soil, the flood bank body 1 is fixedly installed, after the flood bank body is completely fixed, a counterweight sand bag is placed in the flood bank body from the two feed inlets 5, the counterweight sand bag enables the lifting plate 13 and the rotary rod 11 to move downwards, the rotary rod 11 moves downwards to drive the baffle plate 10, the baffle plate 10 moves downwards to squeeze the support rods 9, the support rods 9 deform, the support rods 9 extend outwards and are deeply buried in the soil, the fixing effect is better, the first chain wheels 14 and the second chain wheels 15 provide transmission force for the rotating shafts 4, the rotary rods 21 and the rotary rods are connected with the rotary shafts 11 in a stable mode, and the rotary shafts 11 can rotate smoothly, and the rotary shafts 11 can be stably connected with one another in a rolling mode, and the rotary chute can rotate smoothly, and the rotary shafts 11 can stably rotate, and the rotary shafts can rotate stably.
The above description is of the preferred embodiments of the present invention, and any person skilled in the art may modify the present invention or make modifications to the present invention with the technical solutions described above. Therefore, any simple modification or equivalent made according to the technical solution of the present invention falls within the scope of the protection claimed by the present invention.
Claims (8)
1. The hydraulic engineering temporary flood bank convenient to assemble comprises a flood bank body (1) and is characterized in that a transmission shaft (2) is embedded in the flood bank body (1), the top end of the transmission shaft (2) extends to the outer side of the top of the flood bank body (1), a movable groove (3) is formed in the bottom of the flood bank body (1), the movable groove (3) is sleeved on the outer side of the transmission shaft (2), a plurality of rotating shafts (4) are embedded in the movable groove (3), the bottom ends of the rotating shafts (4) all extend to the outer side of the bottom of the flood bank body (1), and two feed inlets (5) are formed in the top of the flood bank body (1);
A plurality of equal fixedly connected with threaded rod (6) in pivot (4) bottom, a plurality of threaded rod (6) outside all overlaps and is equipped with sleeve (7), a plurality of equal fixedly connected with drill bit (8) in sleeve (7) bottom, a plurality of inside all inlaying of drill bit (8) is equipped with a plurality of support bars (9), a plurality of support bar (9) top fixedly connected with baffle (10), a plurality of support bar (9) bottom all extends to drill bit (8) outside, a plurality of baffle (10) top all is equipped with bull stick (11), bull stick (11) run through threaded rod (6) and pivot (4) and extend to inside of breakwater body (1), a plurality of safety covers (12) of equal fixedly connected with in the outside of breakwater body (1), inside inlaying of breakwater body (1) is equipped with two lifter plates (13), lifter plate (13) cover are established in the bull stick (11) outside.
The rotating rod (11) is movably connected with the baffle (10) through a rolling bearing, the threaded rod (6) is connected with the sleeve (7) through threads, and the lifting plates (13) are respectively connected with the flood control dike body (1) in a sliding manner;
The utility model discloses a flood control device, including transmission shaft (2), threaded rod (6), antifriction bearing, rotary knob (22) fixedly connected with in transmission shaft (2) top, transmission shaft (2) and flood control dyke body (1) pass through antifriction bearing swing joint, a plurality of pivot (4) all pass through antifriction bearing swing joint with flood control dyke body (1), and transmission shaft (2) rotate and drive a plurality of pivots (4) and threaded rod (6) rotate.
2. The hydraulic engineering temporary flood bank convenient to assemble according to claim 1, wherein a plurality of first chain wheels (14) are embedded in the movable groove (3), and the plurality of first chain wheels (14) are fixedly sleeved on the outer side of the transmission shaft (2) respectively.
3. The hydraulic engineering temporary flood bank convenient to assemble according to claim 2, wherein a plurality of second chain wheels (15) are embedded in the movable groove (3), the second chain wheels (15) are fixedly sleeved on the outer sides of the rotating shafts (4), chains (16) are sleeved on the outer sides of the first chain wheels (14) and the second chain wheels (15), and the first chain wheels (14) and the second chain wheels (15) are in driving connection through the chains (16).
4. The hydraulic engineering temporary flood bank convenient to assemble according to claim 1 is characterized in that the bottoms of the baffle plates (10) are fixedly connected with telescopic rods (17), and first springs (18) are sleeved on the outer sides of the telescopic rods (17).
5. The hydraulic engineering temporary flood dike convenient to assemble according to claim 1 is characterized in that the bottoms of the two lifting plates (13) are respectively provided with a second spring (19), and a plurality of second springs (19) are respectively embedded in the flood dike body (1).
6. The hydraulic engineering temporary flood dike convenient to assemble according to claim 1, wherein a plurality of rotating rods (11) are connected with lifting plates (13) through threads.
7. The hydraulic engineering temporary flood bank convenient to assemble according to claim 1, wherein sliding grooves (20) are formed in the threaded rods (6), sliding blocks (21) are embedded in the sliding grooves (20), and the sliding blocks (21) are fixedly sleeved on the outer sides of the rotating rods (11).
8. The hydraulic engineering temporary flood dike convenient to assemble according to claim 1, wherein a plurality of limiting rods (23) are fixedly connected to the bottom of the flood dike body (1), and the limiting rods (23) extend into the sleeve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310197867.XA CN116043770B (en) | 2023-03-03 | 2023-03-03 | A temporary flood embankment for water conservancy projects that is easy to assemble |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310197867.XA CN116043770B (en) | 2023-03-03 | 2023-03-03 | A temporary flood embankment for water conservancy projects that is easy to assemble |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116043770A CN116043770A (en) | 2023-05-02 |
| CN116043770B true CN116043770B (en) | 2025-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310197867.XA Active CN116043770B (en) | 2023-03-03 | 2023-03-03 | A temporary flood embankment for water conservancy projects that is easy to assemble |
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| Country | Link |
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| CN (1) | CN116043770B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113789757A (en) * | 2021-09-16 | 2021-12-14 | 温州富贾科技有限公司 | Assembled flood control dike for flood fighting project |
| CN216973275U (en) * | 2022-03-11 | 2022-07-15 | 宁波广元生态建设有限公司 | Flood bank for hydraulic engineering |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0502578D0 (en) * | 2005-02-07 | 2005-03-16 | Belgrade Installations Ltd | Flood defence barrier |
| GB2426026A (en) * | 2005-05-10 | 2006-11-15 | John Robert Greenwood | Automatic buoyant flood barrier |
| KR101492888B1 (en) * | 2012-10-11 | 2015-02-12 | (주)에스엔비 | Flood protect wall of flwerpot type |
| KR20140099027A (en) * | 2013-02-01 | 2014-08-11 | 강남구 | Height variable type block structure |
| JP3214090U (en) * | 2017-10-06 | 2017-12-21 | 株式会社キ−ストン | sandbag |
| CN218148116U (en) * | 2022-10-08 | 2022-12-27 | 江西沃龙建设有限公司 | Hydraulic engineering is with high-efficient durable flood bank |
-
2023
- 2023-03-03 CN CN202310197867.XA patent/CN116043770B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113789757A (en) * | 2021-09-16 | 2021-12-14 | 温州富贾科技有限公司 | Assembled flood control dike for flood fighting project |
| CN216973275U (en) * | 2022-03-11 | 2022-07-15 | 宁波广元生态建设有限公司 | Flood bank for hydraulic engineering |
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| CN116043770A (en) | 2023-05-02 |
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