CN107044115A - Efficiently intercept the method for floating object and blocked using the drain grating of this method - Google Patents
Efficiently intercept the method for floating object and blocked using the drain grating of this method Download PDFInfo
- Publication number
- CN107044115A CN107044115A CN201710162742.8A CN201710162742A CN107044115A CN 107044115 A CN107044115 A CN 107044115A CN 201710162742 A CN201710162742 A CN 201710162742A CN 107044115 A CN107044115 A CN 107044115A
- Authority
- CN
- China
- Prior art keywords
- branch angle
- grizzly bar
- angle
- length
- grid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B15/00—Cleaning or keeping clear the surface of open water; Apparatus therefor
- E02B15/04—Devices for cleaning or keeping clear the surface of open water from oil or like floating materials by separating or removing these materials
- E02B15/06—Barriers therefor construed for applying processing agents or for collecting pollutants, e.g. absorbent
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/08—Details, e.g. gates, screens
- E02B5/085—Arresting devices for waterborne materials, e.g. gratings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Sewage (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The present invention efficiently delete to block and an angle be provided with the branch of trash rack by the method for interception floating object and the column dirt using this method, not only can effectively intercept block floating object, unique to the floating object interception result of software sheet;The interception at an angle can be run into when the floating object of software sheet is by the trash rack gap that is provided with an angle, is hung on an angle, the part not tangled does not interfere with the natural trickling of current with the minimum strip of current self-assembling formation resistance;Due to the direction of the reverse current of the top of the horn at branch angle, floating object hangs over end of the branch, will not fall off and effectively captures floating object.
Description
Technical field
The present invention relates to environmental protection, plant equipment protection and management of markets in urban districts field, floating object is more particularly to efficiently intercepted
Method and delete and block using the dirt of blocking of this method..
Background technology
With society development and mankind's activity scope expansion, be scattered everywhere various trade wastes and
House refuse, these rubbish and a large amount of pollutants contained, finally all will be scattered drift extremely under wind and rain drop erosion effect
In receiving water body, and greatly pollution is caused to ecological environment generation and seriously endangered;If these trade wastes and life
Rubbish enters the generating in water pumper or power station
Machine, can make their efficiency reduce or even can lead to big accident, cause greatly loss.So the draining in residential block
Groove, rivers river course, scenic spot seashore, municipal drainage and power station and the upstream of water pumper etc. need to intercept the floating in current
Thing.In the trash rack and the trash rack of grid of current conventional fence type, their floating object interception results to solid block preferably,
And intercept effect for the floating object of substantial amounts of discarded clothes now, plastic convenient bag, Polywoven Bag, strand shape, software sheet
Fruit is not good;Barrier slit or grid are too small, and he just gets lodged in stops that current pass through above;Barrier slit or grid are too big, and they have
Change shape such as current and continue to pollute by sewage blocking device and harm downstream waters.
The content of the invention
For above-mentioned problems of the prior art, the present invention provides a kind of method for solving drawbacks described above and uses this method
Drain grating block, this hold-up interception method and delete and block using the dirt of blocking of this method, consolidated the interception to solid block floating object, increased
Effective interception to software sheet floating object, reduces the resistance that the floating object of interception is produced to current.
In order to achieve the above object, solution of the invention is;
The method for efficiently intercepting floating object, including the hole that is connected above trash rack column, trash rack frame, it is characterized in that;Blocking
The grizzly bar that dirty grid are blocked is provided with distance between more than one multiple angles, less than the two parallel adjacent grills of length at branch angle
Length.
A kind of trash rack column;Including trash rack frame, be connected hole and grizzly bar, it is characterized in that;Also include branch angle, the length at branch angle
It is that branch angle on 3/5ths of distance between two adjacent grills, adjacent grizzly bar is staggered, the cross-fixing of branch angle is in grid
Above bar, grizzly bar is fixed on above drain grating frame, and be connected hole on drain grating frame.
A kind of trash rack column;Including trash rack frame, be connected hole and grizzly bar, it is characterized in that;Also include branch angle, branch angle
Length is that the branch angle on 1/3rd of distance between two adjacent grills, adjacent grizzly bar is staggered, the cross-fixing of branch angle
On grizzly bar, grizzly bar is fixed on above drain grating frame, and be connected hole on drain grating frame.
A kind of trash rack column;Including trash rack frame, be connected hole and grizzly bar, it is characterized in that;Also include branch angle, branch angle
Length is that the distance between two adjacent branch angles are two on 1/3rd of distance between two adjacent grills, same grizzly bar
Branch angle arranged opposite between adjacent grill in 1/3rd of distance, adjacent grill, the cross-fixing of branch angle is on grizzly bar, grid
Bar is fixed on above drain grating frame, and be connected hole on drain grating frame.
A kind of trash rack column;Including trash rack frame, be connected hole and grizzly bar, it is characterized in that;Also include branch angle, long shoot angle
Length be 1/2nd of distance between two adjacent grills, the length at brachyplast angle is four of distance between two adjacent grills
/ mono-, the branch angle on same grizzly bar is that the branch angle in length arranged adjacent, two adjacent grills is length arranged opposite, branch
Angle cross-fixing is on grizzly bar, and grizzly bar is fixed on above drain grating frame, and be connected hole on drain grating frame.
A kind of trash rack column;Including trash rack frame, be connected hole and grizzly bar, it is characterized in that;Also include branch angle, square grid
There are a branch angle, branch angle at 1/3rd of the longitude and latitude grizzly bar on column(3)Longitude and latitude grizzly bar with grid fence is arranged in parallel, branch angle
Length be adjacent branch angle the top of the horn in 1/3rd of grid length, same grid distance be grid length three/
One, the cross-fixing of branch angle is on grizzly bar, and grizzly bar is fixed on above drain grating frame, and be connected hole on drain grating frame.
A kind of trash rack column;Including trash rack frame, be connected hole and grizzly bar, it is characterized in that;Also include branch angle, square grid
There is a branch angle at 1/2nd of the longitude and latitude grizzly bar on column, the length at branch angle is 1/3rd of grid length, same grid
In the distance of relative branch angle the top of the horn be 1/3rd of grid length, the cross-fixing of branch angle is on grizzly bar, and grizzly bar is fixed on
Above drain grating frame, be connected hole on drain grating frame.
A kind of trash rack column;Including trash rack frame, be connected hole and grizzly bar, it is characterized in that;Also include branch angle, grid fence
Four right angles respectively have a branch angle in grid, and the length at branch angle is 1/3rd of grid diagonal length, in same grid
Relative branch angle the top of the horn distance is 1/3rd of grid diagonal length, and the cross-fixing of branch angle is on grizzly bar, and grizzly bar is fixed on
Above drain grating frame, be connected hole on drain grating frame.
According to above-mentioned various schemes, it is characterized in that branch angle(3)The horizontal forward bending in front end, branch angle(3)The top of the horn it is inverse
To the direction of current.
Brief description of the drawings
Fig. 1 is the top view of grizzly bar and branch angle;
Fig. 2 to Fig. 8 is the front view that drain grating is blocked;
Label declaration
Drain grating frame 1
Grizzly bar 2
Branch angle 3
Be connected hole 4
Beneficial effects of the present invention
The present invention efficiently delete to block and be provided with branch on the branch of trash rack by the method for interception floating object and the column dirt using this method
Angle, not only can effectively intercept block floating object, unique to the floating object interception result of software sheet;When software sheet
When floating object is by the trash rack gap that is provided with an angle, the interception at an angle can be run into, is hung on an angle, the portion not tangled
Divide with the minimum strip of current self-assembling formation resistance, do not interfere with the natural trickling of current;Due to the reverse water of the top of the horn at branch angle
The direction of stream, floating object hangs over end of the branch, will not fall off and effectively captures floating object.
The description done is blocked to drain grating in the present invention below in conjunction with drawings and the specific embodiments;Refering to shown in Fig. 1 to Fig. 8,
A kind of water surface floater interception system embodiment that the present invention is disclosed, the drain grating for the depth that selection height is more than water is blocked, by column
Dirty grid block it is horizontal stand in current, can be by the hole 4 that is connected on drain grating frame 1 by multiple drain gratings if the water surface is wider
Block to link together and adapt to the width of the water surface, make the reverse water (flow) direction of the top of the horn for being fixed on an angle 3 above grizzly bar 2, floating on water
Thing drift makes it be both intercepted under current scour, and the present invention is provided with an angle on the branch of trash rack, not only can be effective
Block floating object is intercepted, it is unique to the floating object interception result of software;When the floating object of software is by being provided with blocking for an angle
During dirty grid gap, the interception at an angle can be run into, be hung on an angle, the part not tangled with current self-assembling formation resistance most
Small strip, does not interfere with the natural trickling of current;Due to the direction of the reverse current of the top of the horn at branch angle, floating object hangs over end of the branch,
It will not fall off, so floating object can be captured effectively.
To sum up the present invention is efficiently intercepted the method for floating object and blocked using the drain grating of this method, in this description this hair
It is bright to be described with reference to its specific example, it is not intended to limit the invention, is made within the spirit and principles of the invention
Any modification, be all contained within protection scope of the present invention.
Claims (9)
1. efficiently the method for interception floating object and the column dirt using this method are deleted and blocked, including trash rack column, trash rack frame(1)Above
Be connected hole(4), it is characterized in that;The grizzly bar blocked in trash rack(2)On be provided with more than one multiple angles(3).
2. efficiently the method for interception floating object and the column dirt using this method are deleted and blocked;Including trash rack frame(1), be connected hole
(4)And grizzly bar(2), it is characterized in that;Also include branch angle(3), branch angle(3)Length be two adjacent grills(2)Between distance
3/5ths, adjacent grizzly bar(2)On branch angle(3)It is staggered, branch angle(3)Cross-fixing is in grizzly bar(2)Above, grizzly bar
(2)It is fixed on drain grating frame(1)Above, drain grating frame(1)On be connected hole(4).
3. efficiently the method for interception floating object and the column dirt using this method are deleted and blocked;Including trash rack frame(1), be connected hole
(4)And grizzly bar(2), it is characterized in that;Also include branch angle(3), branch angle(3)Length be two adjacent grills(2)Between distance
1/3rd, adjacent grizzly bar(2)On branch angle(3)It is staggered, branch angle(3)Cross-fixing is in grizzly bar(2)Above, grizzly bar
(2)It is fixed on drain grating frame(1)Above, drain grating frame(1)On be connected hole(4).
4. efficiently the method for interception floating object and the column dirt using this method are deleted and blocked;Including trash rack frame(1), be connected hole
(4)And grizzly bar(2), it is characterized in that;Also include branch angle(3), branch angle(3)Length be two adjacent grills(2)Between distance
1/3rd, same grizzly bar(2)Upper two adjacent branch angles(3)The distance between be two adjacent grills(2)Between distance
1/3rd, adjacent grill(2)On branch angle(3)Arranged opposite, branch angle(3)Cross-fixing is in grizzly bar(2)Above, grizzly bar(2)
It is fixed on drain grating frame(1)Above, drain grating frame(1)On be connected hole(4).
5. efficiently the method for interception floating object and the column dirt using this method are deleted and blocked;Including trash rack frame(1), be connected hole
(4)And grizzly bar(2), it is characterized in that;Also include branch angle(3), long shoot angle(3)Length be two adjacent grills(2)Between distance
1/2nd, brachyplast angle(3)Length be two adjacent grills(2)Between distance a quarter, same grizzly bar(2)On
Branch angle(3)It is length arranged adjacent, two adjacent grills(2)On branch angle(3)It is length arranged opposite, branch angle(3)Intersect
It is fixed on grizzly bar(2)Above, grizzly bar(2)It is fixed on drain grating frame(1)Above, drain grating frame(1)On be connected hole(4).
6. efficiently the method for interception floating object and the column dirt using this method are deleted and blocked;Including trash rack frame(1), be connected hole
(4)And grizzly bar(2), it is characterized in that;Also include branch angle(3), the longitude and latitude grizzly bar of grid fence(2)1/3rd at have a branch
Angle(3), branch angle(3)With the longitude and latitude grid of grid fence(2)Bar is arranged in parallel, branch angle(3)Length be grid length three/
One, adjacent branch angle in same grid(3)The distance of the top of the horn is 1/3rd of grid length, branch angle(3)Cross-fixing exists
Grizzly bar(2)Above, grizzly bar(2)It is fixed on drain grating frame(1)Above, drain grating frame(1)On be connected hole(4).
7. efficiently the method for interception floating object and the column dirt using this method are deleted and blocked;Including trash rack frame(1), be connected hole
(4)And grizzly bar(2), it is characterized in that;Also include branch angle(3), the longitude and latitude grizzly bar of grid fence(2)1/2nd at have a branch
Angle(3), branch angle(3)Length be 1/3rd of grid length, relative branch angle in same grid(3)The distance of the top of the horn is
/ 3rd of grid length, branch angle(3)Cross-fixing is in grizzly bar(2)Above, grizzly bar(2)It is fixed on drain grating frame(1)Above,
Drain grating frame(1)On be connected hole(4).
8. efficiently the method for interception floating object and the column dirt using this method are deleted and blocked;Including trash rack frame(1), be connected hole
(4)And grizzly bar(2), it is characterized in that;Also include branch angle(3), four right angles respectively have a branch angle in the grid of grid fence
(3), branch angle(3)Length be 1/3rd of grid diagonal length, relative branch angle in same grid(3)The top of the horn distance is
/ 3rd of grid diagonal length, branch angle(3)Cross-fixing is in grizzly bar(2)Above, grizzly bar(2)It is fixed on drain grating frame(1)
Above, drain grating frame(1)On be connected hole(4).
9. the method for the efficient interception floating object according to claims 1 to 8 and the column dirt using this method are deleted and blocked, it is special
It is an angle to levy(3)The horizontal forward bending in front end, branch angle(3)The reverse current of the top of the horn direction.
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811617993.1A CN109695234A (en) | 2017-03-18 | 2017-03-18 | Trash rack blocks |
CN201710162742.8A CN107044115B (en) | 2017-03-18 | 2017-03-18 | It efficiently intercepts the method for floating material and is blocked using the drain grating of this method |
CN201811617647.3A CN109695233A (en) | 2017-03-18 | 2017-03-18 | It is a kind of intercept floating material trash rack block |
CN201811617994.6A CN109653164A (en) | 2017-03-18 | 2017-03-18 | A kind of efficient trash rack column for intercepting floating material |
CN201811618036.0A CN109706894A (en) | 2017-03-18 | 2017-03-18 | The branch angle on trash rack column |
CN201811617995.0A CN109695235A (en) | 2017-03-18 | 2017-03-18 | The trash rack for intercepting floating material blocks |
CN201811617597.9A CN109695231A (en) | 2017-03-18 | 2017-03-18 | The trash rack for efficiently intercepting floating material blocks |
CN201811617601.1A CN109695232A (en) | 2017-03-18 | 2017-03-18 | A kind of trash rack blocks |
CN201811617630.8A CN109706893A (en) | 2017-03-18 | 2017-03-18 | A kind of grid block |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710162742.8A CN107044115B (en) | 2017-03-18 | 2017-03-18 | It efficiently intercepts the method for floating material and is blocked using the drain grating of this method |
Related Child Applications (8)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201811617995.0A Division CN109695235A (en) | 2017-03-18 | 2017-03-18 | The trash rack for intercepting floating material blocks |
CN201811617647.3A Division CN109695233A (en) | 2017-03-18 | 2017-03-18 | It is a kind of intercept floating material trash rack block |
CN201811617993.1A Division CN109695234A (en) | 2017-03-18 | 2017-03-18 | Trash rack blocks |
CN201811617994.6A Division CN109653164A (en) | 2017-03-18 | 2017-03-18 | A kind of efficient trash rack column for intercepting floating material |
CN201811617597.9A Division CN109695231A (en) | 2017-03-18 | 2017-03-18 | The trash rack for efficiently intercepting floating material blocks |
CN201811617630.8A Division CN109706893A (en) | 2017-03-18 | 2017-03-18 | A kind of grid block |
CN201811617601.1A Division CN109695232A (en) | 2017-03-18 | 2017-03-18 | A kind of trash rack blocks |
CN201811618036.0A Division CN109706894A (en) | 2017-03-18 | 2017-03-18 | The branch angle on trash rack column |
Publications (2)
Publication Number | Publication Date |
---|---|
CN107044115A true CN107044115A (en) | 2017-08-15 |
CN107044115B CN107044115B (en) | 2019-09-24 |
Family
ID=59545177
Family Applications (9)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201710162742.8A Expired - Fee Related CN107044115B (en) | 2017-03-18 | 2017-03-18 | It efficiently intercepts the method for floating material and is blocked using the drain grating of this method |
CN201811617597.9A Withdrawn CN109695231A (en) | 2017-03-18 | 2017-03-18 | The trash rack for efficiently intercepting floating material blocks |
CN201811618036.0A Withdrawn CN109706894A (en) | 2017-03-18 | 2017-03-18 | The branch angle on trash rack column |
CN201811617995.0A Withdrawn CN109695235A (en) | 2017-03-18 | 2017-03-18 | The trash rack for intercepting floating material blocks |
CN201811617630.8A Withdrawn CN109706893A (en) | 2017-03-18 | 2017-03-18 | A kind of grid block |
CN201811617993.1A Withdrawn CN109695234A (en) | 2017-03-18 | 2017-03-18 | Trash rack blocks |
CN201811617994.6A Withdrawn CN109653164A (en) | 2017-03-18 | 2017-03-18 | A kind of efficient trash rack column for intercepting floating material |
CN201811617601.1A Pending CN109695232A (en) | 2017-03-18 | 2017-03-18 | A kind of trash rack blocks |
CN201811617647.3A Pending CN109695233A (en) | 2017-03-18 | 2017-03-18 | It is a kind of intercept floating material trash rack block |
Family Applications After (8)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201811617597.9A Withdrawn CN109695231A (en) | 2017-03-18 | 2017-03-18 | The trash rack for efficiently intercepting floating material blocks |
CN201811618036.0A Withdrawn CN109706894A (en) | 2017-03-18 | 2017-03-18 | The branch angle on trash rack column |
CN201811617995.0A Withdrawn CN109695235A (en) | 2017-03-18 | 2017-03-18 | The trash rack for intercepting floating material blocks |
CN201811617630.8A Withdrawn CN109706893A (en) | 2017-03-18 | 2017-03-18 | A kind of grid block |
CN201811617993.1A Withdrawn CN109695234A (en) | 2017-03-18 | 2017-03-18 | Trash rack blocks |
CN201811617994.6A Withdrawn CN109653164A (en) | 2017-03-18 | 2017-03-18 | A kind of efficient trash rack column for intercepting floating material |
CN201811617601.1A Pending CN109695232A (en) | 2017-03-18 | 2017-03-18 | A kind of trash rack blocks |
CN201811617647.3A Pending CN109695233A (en) | 2017-03-18 | 2017-03-18 | It is a kind of intercept floating material trash rack block |
Country Status (1)
Country | Link |
---|---|
CN (9) | CN107044115B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107893408A (en) * | 2017-12-07 | 2018-04-10 | 刘曼华 | A kind of refuse collector of garbage floating on water surface |
CN107975020A (en) * | 2017-12-07 | 2018-05-01 | 刘曼华 | A kind of collection device that floating grease and rubbish are collected on dykes and dams |
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US3979291A (en) * | 1972-12-07 | 1976-09-07 | National Marine Service, Inc. | Oil boom and method of skimming floating oil from the surface of a body of water |
CN2559684Y (en) * | 2002-04-23 | 2003-07-09 | 孙永祥 | Water surface floating object intercepting apparatus |
CN204491536U (en) * | 2014-12-12 | 2015-07-22 | 田洪臣 | A kind of trashrack hurdle, power station |
CN205314068U (en) * | 2015-11-20 | 2016-06-15 | 东北石油大学 | Power station dam trash rack |
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CN1727592A (en) * | 2004-07-28 | 2006-02-01 | 潘汉辞 | Method of automatic cleaning up rubbish on drainage comb |
CN201459909U (en) * | 2009-06-22 | 2010-05-12 | 吕月宝 | Anti-fouling fence |
CN202945660U (en) * | 2012-12-18 | 2013-05-22 | 吴德东 | Novel anti-blocking floor drain for toilet |
CN203144997U (en) * | 2013-03-12 | 2013-08-21 | 郭晓敏 | Sundry collecting and fishing device |
US9567740B2 (en) * | 2014-08-15 | 2017-02-14 | Brenda SADLER | Catch basin grate |
CN104295122A (en) * | 2014-09-28 | 2015-01-21 | 周伟 | Demountable shower room base |
CN104295123A (en) * | 2014-09-28 | 2015-01-21 | 周伟 | Deodorant shower room base |
CN204570848U (en) * | 2015-04-29 | 2015-08-19 | 邵光磊 | A kind of water trough plug collecting hair |
CN204690859U (en) * | 2015-06-18 | 2015-10-07 | 房欣冉 | A kind of anti-clogging pipeline connection port |
CN205100190U (en) * | 2015-10-21 | 2016-03-23 | 林美莲 | Dirty cleaning device is blocked in power station |
-
2017
- 2017-03-18 CN CN201710162742.8A patent/CN107044115B/en not_active Expired - Fee Related
- 2017-03-18 CN CN201811617597.9A patent/CN109695231A/en not_active Withdrawn
- 2017-03-18 CN CN201811618036.0A patent/CN109706894A/en not_active Withdrawn
- 2017-03-18 CN CN201811617995.0A patent/CN109695235A/en not_active Withdrawn
- 2017-03-18 CN CN201811617630.8A patent/CN109706893A/en not_active Withdrawn
- 2017-03-18 CN CN201811617993.1A patent/CN109695234A/en not_active Withdrawn
- 2017-03-18 CN CN201811617994.6A patent/CN109653164A/en not_active Withdrawn
- 2017-03-18 CN CN201811617601.1A patent/CN109695232A/en active Pending
- 2017-03-18 CN CN201811617647.3A patent/CN109695233A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US3979291A (en) * | 1972-12-07 | 1976-09-07 | National Marine Service, Inc. | Oil boom and method of skimming floating oil from the surface of a body of water |
CN2559684Y (en) * | 2002-04-23 | 2003-07-09 | 孙永祥 | Water surface floating object intercepting apparatus |
CN204491536U (en) * | 2014-12-12 | 2015-07-22 | 田洪臣 | A kind of trashrack hurdle, power station |
CN205314068U (en) * | 2015-11-20 | 2016-06-15 | 东北石油大学 | Power station dam trash rack |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107893408A (en) * | 2017-12-07 | 2018-04-10 | 刘曼华 | A kind of refuse collector of garbage floating on water surface |
CN107975020A (en) * | 2017-12-07 | 2018-05-01 | 刘曼华 | A kind of collection device that floating grease and rubbish are collected on dykes and dams |
Also Published As
Publication number | Publication date |
---|---|
CN109695234A (en) | 2019-04-30 |
CN109706893A (en) | 2019-05-03 |
CN109706894A (en) | 2019-05-03 |
CN109695231A (en) | 2019-04-30 |
CN109695235A (en) | 2019-04-30 |
CN107044115B (en) | 2019-09-24 |
CN109695233A (en) | 2019-04-30 |
CN109695232A (en) | 2019-04-30 |
CN109653164A (en) | 2019-04-19 |
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