CN208718042U - A kind of ditch head drop prefabricated component - Google Patents
A kind of ditch head drop prefabricated component Download PDFInfo
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- CN208718042U CN208718042U CN201821314228.8U CN201821314228U CN208718042U CN 208718042 U CN208718042 U CN 208718042U CN 201821314228 U CN201821314228 U CN 201821314228U CN 208718042 U CN208718042 U CN 208718042U
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Abstract
A kind of ditch head drop prefabricated component is related to a kind of ditch head drop prefabricated component.Climate influences the big problem of the artificial quantity greatly and needed when purpose is ditch head drop site operation in existing gully head protection works.Ditch head drop prefabricated component is made of vertical prefabricated component, inclination prefabricated component, horizontal prefabricated component, vertical barricade, horizontal barricade, inclination barricade and energy dissipation pier；It is affixed to tilt prefabricated component lower end and horizontal prefabricated component middle part, it tilts prefabricated component upper end and vertical prefabricated component lower end is affixed, horizontal prefabricated component upper surface two sides are symmetrically arranged with horizontal barricade, inclination prefabricated component front surface two sides are symmetrically arranged with inclination barricade, and vertical prefabricated component front surface is symmetrically arranged with vertical barricade；Water blocking edge, horizontal barricade and inclination prefabricated component enclosed area constitute stilling pond；Inclination prefabricated component front surface is provided with several rows of energy dissipation piers shifted to install.The utility model ditch head drop prefabricated component avoids the soil erosion of erosion groove, and construction site effect on environment is small.The utility model is suitable for administering erosion groove.
Description
Technical field
The utility model relates to a kind of engineering measures of soil and water conservation, and in particular to a kind of ditch head drop prefabricated component.
Background technique
China is one of world's soil erosion country the most serious, and the improvement of soil erosion is mainly the transformation of sloping upland
And in sloping upland erosion groove improvement, by the implementation of water-and-soil conservation measures, middle-and-low-yielding fields are transformed, and grain yield is mentioned
Height, farmers' income increase.
In every control measures of erosion groove, gully head protection works are an important engineering measures of soil and water conservation.Ditch head
Protection works are to prevent runoff from washing away and causing the engineering measures of soil and water conservation and biology that ditch head advances and slope surface silkworm loses and takes
Measure.The effect of gully head protection works: prevent slope surface storm runoff by slope surface enter channel or it is controlled enter channel, prevent
Ditch head advances, and protects ground not by gully cutting damage.Gully head protection works mainly include two kinds of engineerings of water storage type and drainage type
Layout, the drop of ditch head belong to drainage type gully head protection works, and common ditch head drop has: willow drop, stone masonry drop etc..Its
In, the stability of stone masonry drop is relatively good, but simultaneously, and there is also some problems for the drop of the stones matter such as stone masonry:
Stone masonry drop is site operation, and construction site disperses and project amount is big, so the artificial quantity needed is big, construction
The problem of low efficiency and wastage of material.Site operation has greater environmental impacts, and site operation is northern also by climatic effect
Winter can not construct.The materials of stone material as raw material and transport are also limited by region.
Utility model content
The utility model is that climate is influenced big and needed when solving ditch head drop site operation in existing gully head protection works
The big problem of the artificial quantity wanted, and then propose a kind of ditch head drop prefabricated component.
The utility model ditch head drop prefabricated component by vertical prefabricated component, inclination prefabricated component, horizontal prefabricated component, vertical barricade,
Horizontal barricade, inclination barricade and energy dissipation pier are constituted；
The vertical prefabricated component is trapezoidal plate, and vertical prefabricated component is vertically arranged, longer egative film court in vertical prefabricated component
Upper setting is provided with overflow port on the longer egative film of vertical prefabricated component；The inclination prefabricated component is rectangular plate-like；The level
Prefabricated component is rectangular plate-like；
The bottom surface of the horizontal prefabricated component is provided with the first strip shaped supports close to rear end；First strip shaped supports part edge
The length direction of horizontal prefabricated component is arranged, and the front end of horizontal prefabricated component is vertically connected with water blocking edge；Water blocking is kept off along being trapezoidal plate
The longer egative film on water edge is arranged upward；The energy dissipation pier is cube shaped；
The inclination prefabricated component lower end and affixed, inclination prefabricated component upper end and vertical prefabricated component lower end in the middle part of horizontal prefabricated component
Affixed, horizontal prefabricated component upper surface two sides are symmetrically arranged with horizontal barricade, and inclination prefabricated component front surface two sides, which are symmetrically arranged with, inclines
Oblique barricade, vertical prefabricated component front surface are symmetrically arranged with vertical barricade；The upper end of horizontal barricade is towards inclination outside horizontal prefabricated component
Tiltedly, inclination barricade upper end is towards inclination on the outside of inclination prefabricated component, and vertical barricade upper end is towards inclination on the outside of vertical prefabricated component；It is horizontal
Along affixed, horizontal barricade rear end face and inclination barricade front end face are affixed for barricade front end face and water blocking, inclination barricade rear end face and perpendicular
Straight barricade is affixed, water blocking edge, horizontal barricade and the enclosed area composition stilling pond for tilting prefabricated component；Inclination prefabricated component front surface is set
Several rows of energy dissipation piers are equipped with, the energy dissipation pier in adjacent rows shifts to install；
The energy dissipation pier is cube shaped；The side length of energy dissipation pier is 9~11cm, and the spacing of adjacent energy dissipation pier is 29
~31cm；
It is described inclination prefabricated component with respect to the horizontal plane between inclination angle be 40~50 degree；
The vertical prefabricated component, inclination prefabricated component, horizontal prefabricated component, vertical barricade, horizontal barricade and inclination barricade are steel
Reinforced concrete material；Energy dissipation pier is concrete material.
Steel in the vertical prefabricated component, inclination prefabricated component, horizontal prefabricated component, vertical barricade, horizontal barricade and inclination barricade
The spacing of muscle is 5~10cm.
The application method of the utility model ditch head drop prefabricated component are as follows:
Respectively extend 15~25cm to prefabricated component two sides first, in accordance with ditch head drop prefabricated component longitudinal size and carry out clear base, then
The gap for modifying erosion groove to the side of two sides furrow bank and ditch head drop prefabricated component is 45~55cm, and ditch head drop prefabricated component is set
In in erosion groove, wherein vertical prefabricated component is towards the water source direction of erosion groove, water side of the horizontal prefabricated component towards erosion groove
To.The soil generated when the two sides furrow bank that will modify erosion groove is backfilled to furrow bank and vertical barricade, horizontal barricade and inclination barricade
Gap in and make real, that is, complete.
It the utility model principle and has the beneficial effect that
1, the utility model ditch head drop prefabricated component using when be placed in erosion groove, vertical prefabricated component be the utility model ditch
The water inlet end of head drop prefabricated component, water flow overflows into ditch head drop prefabricated component from overflow port in erosion groove, after tilting prefabricated component
In the stilling pond constituted into the enclosed area on water blocking edge, horizontal barricade and inclination prefabricated component, finally from water blocking along spilling；Vertically
Barricade, horizontal barricade and inclination barricade can guide water flow, and water flow is prevented to wash away two lateral sulcus banks；Disappearing in adjacent rows
Energy pier shifts to install, and making energy dissipation pier is in the arrangement of isosceles triangle, and energy dissipation pier from top to bottom can cut down water energy step by step, to greatest extent
Ground reduces the scouring force of water flow, while effective draining, controls water velocity and the erosion to ditch bank well；Through energy dissipating
Pier, which cuts down water flow after water energy step by step and enters stilling pond, temporarily to be stored, and the water energy for further cutting down upland water simultaneously reduces water outlet
Erosion to channel.Therefore, the utility model can efficiently use the characteristics of prefabricated component top draining, and water is effectively dredged out
It goes, avoids the soil erosion of erosion groove, the final improvement for realizing erosion groove.
2, the utility model ditch head drop preform material is that reinforced concrete precast member subtracts compared to the structure of stone masonry
Construction working hour is lacked, the labo r usage of 50-70% can be reduced compared with the structure of stone masonry, construction quality is easily guaranteed that, former
Material is easily obtained, and constructing operation is simple, and construction technology is easy to grasp, and substantially increases construction efficiency, is suitble to a wide range of
It promotes；And vertical prefabricated component, inclination prefabricated component and horizontal prefabricated component are an overall structure, greatly improve prefabricated component ditch head
The overall stability of drop；Utility model device is prefabrication, and large-scale production not only ensure that product quality, but also significantly
Reduce production cost.Reduce site operation link, it is ensured that construction site is more environmentally-friendly, and construction site effect on environment is small；
The utility model is avoided in the form of prefabrication by climatic effect, even if northerly winter still is able to construct.
Detailed description of the invention
Fig. 1 is the utility model ditch head drop preform structure schematic diagram；
Fig. 2 is water flow schematic diagram when energy dissipation pier 8 realizes reduction water energy step by step.
Specific embodiment:
Technical solutions of the utility model are not limited to that specific embodiments lis below, and further include each specific embodiment
Between any reasonable combination.
Specific embodiment 1: illustrate present embodiment in conjunction with Fig. 1 and Fig. 2, present embodiment ditch head drop prefabricated component by
Vertical prefabricated component 1, inclination prefabricated component 2, horizontal prefabricated component 3, vertical barricade 5, horizontal barricade 7, inclination barricade 6 and 8 structure of energy dissipation pier
At；
The vertical prefabricated component 1 is trapezoidal plate, and vertical prefabricated component 1 is vertically arranged, longer egative film in vertical prefabricated component 1
It is arranged upward, is provided with overflow port 9 on the longer egative film of vertical prefabricated component 1；The inclination prefabricated component 2 is rectangular plate-like；Institute
Stating horizontal prefabricated component 3 is rectangular plate-like；
The bottom surface of the horizontal prefabricated component 3 is provided with the first strip shaped supports 31 close to rear end；First strip shaped supports
31 length directions along horizontal prefabricated component 3 are arranged, and the front end of horizontal prefabricated component 3 is vertically connected with water blocking along 32；Water blocking edge
32 be trapezoidal plate, and water blocking is arranged upward along 32 longer egative film；The energy dissipation pier 8 is cube shaped；
2 lower end of inclination prefabricated component and horizontal 3 middle part of prefabricated component are affixed, inclination 2 upper end of prefabricated component and vertical prefabricated component 1
Lower end is affixed, and horizontal 3 upper surface two sides of prefabricated component are symmetrically arranged with horizontal barricade 7, and inclination 2 front surface two sides of prefabricated component are symmetrically set
It is equipped with inclination barricade 6, vertical 1 front surface of prefabricated component is symmetrically arranged with vertical barricade 5；The upper end of horizontal barricade 7 is towards horizontal pre-
It is tilted on the outside of product 3, inclination 6 upper end of barricade on the outside of inclination prefabricated component 2 towards tilting, and vertical 5 upper end of barricade is towards vertical prefabricated
It is tilted on the outside of part 1；Horizontal 7 front end face of barricade and water blocking are affixed along 32, and horizontal 7 rear end face of barricade and inclination 6 front end face of barricade are solid
It connects, tilts 6 rear end face of barricade and vertical barricade 5 is affixed, water blocking is along the enclosed area of 32, horizontal barricade 7 and inclination prefabricated component 2
Constitute stilling pond；Inclination 2 front surface of prefabricated component is provided with several rows of energy dissipation piers 8, and the energy dissipation pier 8 in adjacent rows shifts to install.
Present embodiment have it is following the utility model has the advantages that
1, present embodiment ditch head drop prefabricated component using when be placed in erosion groove, vertical prefabricated component 1 be present embodiment
Ditch head drops the water inlet end of prefabricated component, and water flow overflows into ditch head drop prefabricated component from overflow port 9 in erosion groove, by tilting prefabricated component
Enter water blocking after 2 along the stilling pond that the enclosed area of 32, horizontal barricade 7 and inclination prefabricated component 2 is constituted, finally from water blocking along 32
It overflows；Vertical barricade 5, horizontal barricade 7 and inclination barricade 6 can guide water flow, and water flow is prevented to wash away two lateral sulcus banks；
Energy dissipation pier 8 in adjacent rows shifts to install, and making energy dissipation pier 8 is in the arrangement of isosceles triangle, and energy dissipation pier 8 from top to bottom can be cut step by step
Diminishing energy reduces the scouring force of water flow to the maximum extent, while effective draining, controls water velocity well and to ditch
The erosion of bank；Water flow enters stilling pond and is temporarily stored after energy dissipation pier 8 cuts down water energy step by step, further cuts down upland water
Water energy and reduce and be discharged erosion to channel.Therefore, present embodiment can efficiently use the characteristics of prefabricated component top draining,
Water is effectively dredged away, the soil erosion of erosion groove is avoided, the final improvement for realizing erosion groove.
2, present embodiment ditch head drop preform material is that reinforced concrete precast member subtracts compared to the structure of stone masonry
Construction working hour is lacked, the labo r usage of 50-70% can be reduced compared with the structure of stone masonry, construction quality is easily guaranteed that, former
Material is easily obtained, and constructing operation is simple, and construction technology is easy to grasp, and substantially increases construction efficiency, is suitble to a wide range of
It promotes；And vertical prefabricated component 1, inclination prefabricated component 2 and horizontal prefabricated component 3 are an overall structure, greatly improve prefabricated component
The overall stability of ditch head drop；Present embodiment device is prefabrication, and large-scale production not only ensure that product quality, but also
Greatly reduce production cost.Reduce site operation link, it is ensured that construction site is more environmentally-friendly, construction site effect on environment
It is small；Present embodiment is avoided in the form of prefabrication by climatic effect, even if northerly winter still is able to construct.
Specific embodiment 2: the present embodiment is different from the first embodiment in that: the energy dissipation pier 8 is cube
Shape；The side length of energy dissipation pier 8 is 9~11cm, and the spacing of adjacent energy dissipation pier 8 is 29~31cm.Other steps and parameter and tool
Body embodiment one is identical.
Specific embodiment 3: the present embodiment is different from the first and the second embodiment in that: the inclination prefabricated component 2
Inclination angle between with respect to the horizontal plane is 40~50 degree.Other steps and parameter are the same as one or two specific embodiments.
Specific embodiment 4: unlike one of present embodiment and specific embodiment one to three: described vertical pre-
Product 1, inclination prefabricated component 2, horizontal prefabricated component 3, vertical barricade 5, horizontal barricade 7 and inclination barricade 6 are armored concrete material
Matter；Energy dissipation pier 8 is concrete material.Other steps and parameter are identical as one of specific embodiment one to three.
Specific embodiment 5: unlike one of present embodiment and specific embodiment one to four: described vertical pre-
The spacing of reinforcing bar is 5 in product 1, inclination prefabricated component 2, horizontal prefabricated component 3, vertical barricade 5, horizontal barricade 7 and inclination barricade 6
~10cm.Other steps and parameter are identical as one of specific embodiment one to four.
Using following embodiment verifying the utility model has the beneficial effects that
Embodiment 1: the present embodiment ditch head drop prefabricated component by vertical prefabricated component 1, inclination prefabricated component 2, horizontal prefabricated component 3,
Vertical barricade 5, horizontal barricade 7, inclination barricade 6 and energy dissipation pier 8 are constituted；
The vertical prefabricated component 1 is trapezoidal plate, and vertical prefabricated component 1 is vertically arranged, longer egative film in vertical prefabricated component 1
It is arranged upward, is provided with overflow port 9 on the longer egative film of vertical prefabricated component 1；The inclination prefabricated component 2 is rectangular plate-like；Institute
Stating horizontal prefabricated component 3 is rectangular plate-like；
The bottom surface of the horizontal prefabricated component 3 is provided with the first strip shaped supports 31 close to rear end；First strip shaped supports
31 length directions along horizontal prefabricated component 3 are arranged, and the front end of horizontal prefabricated component 3 is vertically connected with water blocking along 32；Water blocking edge
32 be trapezoidal plate, and water blocking is arranged upward along 32 longer egative film；The energy dissipation pier 8 is cube shaped；
2 lower end of inclination prefabricated component and horizontal 3 middle part of prefabricated component are affixed, inclination 2 upper end of prefabricated component and vertical prefabricated component 1
Lower end is affixed, and horizontal 3 upper surface two sides of prefabricated component are symmetrically arranged with horizontal barricade 7, and inclination 2 front surface two sides of prefabricated component are symmetrically set
It is equipped with inclination barricade 6, vertical 1 front surface of prefabricated component is symmetrically arranged with vertical barricade 5；The upper end of horizontal barricade 7 is towards horizontal pre-
It is tilted on the outside of product 3, inclination 6 upper end of barricade on the outside of inclination prefabricated component 2 towards tilting, and vertical 5 upper end of barricade is towards vertical prefabricated
It is tilted on the outside of part 1；Horizontal 7 front end face of barricade and water blocking are affixed along 32, and horizontal 7 rear end face of barricade and inclination 6 front end face of barricade are solid
It connects, tilts 6 rear end face of barricade and vertical barricade 5 is affixed, water blocking is along the enclosed area of 32, horizontal barricade 7 and inclination prefabricated component 2
Constitute stilling pond；Inclination 2 front surface of prefabricated component is provided with several rows of energy dissipation piers 8, and the energy dissipation pier 8 in adjacent rows shifts to install；
The energy dissipation pier 8 is cube shaped；The side length of energy dissipation pier 8 is 10cm, and the spacing of adjacent energy dissipation pier 8 is
30cm；It is described inclination prefabricated component 2 with respect to the horizontal plane between inclination angle be 45 degree；
The vertical prefabricated component 1, inclination prefabricated component 2, horizontal prefabricated component 3, vertical barricade 5, horizontal barricade 7 and inclination barricade
6 be armored concrete material；Energy dissipation pier 8 is concrete material；The vertical prefabricated component 1, inclination prefabricated component 2, horizontal prefabricated component
3, the spacing of reinforcing bar is 8cm in vertical barricade 5, horizontal barricade 7 and inclination barricade 6.
The present embodiment ditch head drop prefabricated component using when be placed in erosion groove, vertical prefabricated component 1 be the present embodiment ditch head fall
The water inlet end of water prefabricated component, water flow overflows into ditch head drop prefabricated component from overflow port 9 in erosion groove, laggard by inclination prefabricated component 2
Enter water blocking along the stilling pond that the enclosed area of 32, horizontal barricade 7 and inclination prefabricated component 2 is constituted, is finally overflowed from water blocking along 32；
Vertical barricade 5, horizontal barricade 7 and inclination barricade 6 can guide water flow, and water flow is prevented to wash away two lateral sulcus banks；It is adjacent
Energy dissipation pier 8 in row shifts to install, and making energy dissipation pier 8 is in the arrangement of isosceles triangle, and energy dissipation pier 8 from top to bottom can be cut down step by step
Water energy reduces the scouring force of water flow to the maximum extent, while effective draining, controls water velocity well and to ditch bank
Erosion；Water flow enters stilling pond and is temporarily stored after energy dissipation pier 8 cuts down water energy step by step, further cuts down upland water
Water energy simultaneously reduces the erosion being discharged to channel.Therefore, the present embodiment can efficiently use the characteristics of prefabricated component top draining, by water
It effectively dredges away, avoids the soil erosion of erosion groove, the final improvement for realizing erosion groove.The drop of the present embodiment ditch head is pre-
Product material is reinforced concrete precast member, compared to the structure of stone masonry, reduces construction working hour, compared with the structure of stone masonry
The labo r usage of 50-70% can be reduced, construction quality is easily guaranteed that raw material are easily obtained, and constructing operation is simple, applies
Work technology is easy to grasp, and substantially increases construction efficiency, suitable for large-scale promotion；And vertical prefabricated component 1, inclination prefabricated component 2
It is an overall structure with horizontal prefabricated component 3, greatly improves the overall stability of prefabricated component ditch head drop；The present embodiment device
For prefabrication, large-scale production not only ensure that product quality, but also greatly reduce production cost.Reduce site operation ring
Section, it is ensured that construction site is more environmentally-friendly, and construction site effect on environment is small；The present embodiment avoided in the form of prefabrication by
To climatic effect, even if northerly winter still is able to construct.
Claims (5)
- The prefabricated component 1. a kind of ditch head drops, it is characterised in that: ditch head drops prefabricated component by vertical prefabricated component (1), inclination prefabricated component (2), horizontal prefabricated component (3), vertical barricade (5), horizontal barricade (7), inclination barricade (6) and energy dissipation pier (8) are constituted；The vertical prefabricated component (1) is trapezoidal plate, and vertical prefabricated component (1) is vertically arranged, longer bottom in vertical prefabricated component (1) Piece is arranged upward, is provided with overflow port (9) on the longer egative film of vertical prefabricated component (1)；The inclination prefabricated component (2) is rectangle Plate；The horizontal prefabricated component (3) is rectangular plate-like；The energy dissipation pier (8) is cube shaped；The bottom surface of the horizontal prefabricated component (3) is provided with the first strip shaped supports (31) close to rear end；First strip shaped supports (31) part is arranged along the length direction of horizontal prefabricated component (3), and the front end of horizontal prefabricated component (3) is vertically connected with water blocking along (32)； Water blocking is trapezoidal plate along (32), and longer egative film of the water blocking along (32) is arranged upward；It is affixed in the middle part of the inclination prefabricated component (2) lower end and horizontal prefabricated component (3), inclination prefabricated component (2) upper end with it is prefabricated vertically Part (1) lower end is affixed, and horizontal prefabricated component (3) upper surface two sides are symmetrically arranged with horizontal barricade (7), table before inclination prefabricated component (2) Face two sides are symmetrically arranged with inclination barricade (6), and vertical prefabricated component (1) front surface is symmetrically arranged with vertical barricade (5)；Horizontal barricade (7) upper end is tilted towards horizontal prefabricated component (3) outside, and inclination barricade (6) upper end is tilted towards inclination prefabricated component (2) outside, Vertical barricade (5) upper end is towards inclination on the outside of vertical prefabricated component (1)；Horizontal barricade (7) front end face and water blocking edge (32) are affixed, water Flat barricade (7) rear end face and inclination barricade (6) front end face are affixed, tilt barricade (6) rear end face and vertical barricade (5) is affixed, gear Water constitutes stilling pond along the enclosed area of (32), horizontal barricade (7) and inclination prefabricated component (2)；Inclination prefabricated component (2) front surface is set It is equipped with several rows of energy dissipation piers (8), the energy dissipation pier (8) in adjacent rows shifts to install.
- The prefabricated component 2. ditch head according to claim 1 drops, it is characterised in that: the side length of the energy dissipation pier (8) is 9~ The spacing of 11cm, adjacent energy dissipation pier (8) are 29~31cm.
- The prefabricated component 3. ditch head according to claim 1 drops, it is characterised in that: the inclination prefabricated component (2) is relative to water Inclination angle between plane is 40~50 degree.
- The prefabricated component 4. ditch head according to claim 1 drops, it is characterised in that: the vertical prefabricated component (1), inclination are prefabricated Part (2), horizontal prefabricated component (3), vertical barricade (5), horizontal barricade (7) and inclination barricade (6) are armored concrete material；Energy dissipating Pier (8) is concrete material.
- The prefabricated component 5. ditch head according to claim 1 drops, it is characterised in that: the vertical prefabricated component (1), inclination are prefabricated Part (2), horizontal prefabricated component (3), vertical barricade (5), horizontal barricade (7) and tilt barricade (6) interior reinforcing bar spacing be 5~ 10cm。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821314228.8U CN208718042U (en) | 2018-08-15 | 2018-08-15 | A kind of ditch head drop prefabricated component |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821314228.8U CN208718042U (en) | 2018-08-15 | 2018-08-15 | A kind of ditch head drop prefabricated component |
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| Publication Number | Publication Date |
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| CN208718042U true CN208718042U (en) | 2019-04-09 |
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ID=65977831
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607586A (en) * | 2021-07-19 | 2021-11-05 | 国网浙江省电力有限公司经济技术研究院 | Drop-wall flow separation test device |
-
2018
- 2018-08-15 CN CN201821314228.8U patent/CN208718042U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607586A (en) * | 2021-07-19 | 2021-11-05 | 国网浙江省电力有限公司经济技术研究院 | Drop-wall flow separation test device |
| CN113607586B (en) * | 2021-07-19 | 2024-04-26 | 国网浙江省电力有限公司经济技术研究院 | Drop-wall-attached flow separation test device |
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Effective date of registration: 20200119 Address after: 150080 Heilongjiang City, Harbin Province, Nangang District Road No. 78 Patentee after: Heilongjiang Longyan water conservancy planning and Design Co., Ltd Address before: 150080 Heilongjiang City, Harbin Province, Nangang District Road No. 78 Patentee before: Heilongjiang Prov. Water Conservancy Science Inst. |