CN110402869B - Eight diagrams spider net type stereo net cage - Google Patents
Eight diagrams spider net type stereo net cage Download PDFInfo
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- CN110402869B CN110402869B CN201910801111.5A CN201910801111A CN110402869B CN 110402869 B CN110402869 B CN 110402869B CN 201910801111 A CN201910801111 A CN 201910801111A CN 110402869 B CN110402869 B CN 110402869B
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- 238000010586 diagram Methods 0.000 title claims abstract description 15
- 241000239290 Araneae Species 0.000 title claims description 5
- 238000002955 isolation Methods 0.000 claims abstract description 27
- 241000251468 Actinopterygii Species 0.000 claims description 6
- 238000009360 aquaculture Methods 0.000 abstract description 7
- 244000144974 aquaculture Species 0.000 abstract description 7
- 244000005700 microbiome Species 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 238000009313 farming Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 230000000694 effects Effects 0.000 description 11
- 238000000926 separation method Methods 0.000 description 11
- 241000221931 Hypomyces rosellus Species 0.000 description 6
- 230000000875 corresponding effect Effects 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 208000010824 fish disease Diseases 0.000 description 3
- 241000269799 Perca fluviatilis Species 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 230000037406 food intake Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/60—Floating cultivation devices, e.g. rafts or floating fish-farms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
-
- 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
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Zoology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention discloses an eight diagrams spider-web type three-dimensional net cage, which belongs to the technical field of aquaculture and comprises a frame, a netting and an isolation net, wherein the surface of the frame is connected with a transverse connecting rod and a longitudinal connecting rod, the transverse connecting rod and the longitudinal connecting rod are arranged in a staggered manner, the netting is arranged in the frame, the bottom of the frame is connected with a connecting cable, the tail end of the connecting cable is connected with a free suspended weight body, the lower surface of the free suspended weight body is connected with a self-mooring chain, and the tail end of the self-mooring chain is connected with a self-mooring weight. The structural stability of the design of this box with a net is strong, can effectually avoid the problem that the volume ratio is low, can the microorganism and the filth of self-cleaning netting surface adhesion, makes the farming environment be close to nature more, has promoted the quality of aquaculture.
Description
Technical Field
The invention belongs to the technical field of aquaculture, and particularly relates to an eight diagrams cobweb type three-dimensional net cage.
Background
The net cage culture is an important part of ocean economy and has wide market and development potential. The net cage culture process does not need auxiliary resources, saves resources and has the characteristics of low investment and high return. The key factor for restricting deep sea cultivation lies in the wind and wave resistance of the net cage, and the solution of the problem can add assistance to the deep water development of the whole industry.
In the ocean, the net cage culture faces the influence of wind, wave and current, and under the action of tide, the shape surrounded by the flexible net of the cage body is easy to deform, so that the volume ratio is reduced, and the fishes die by extrusion. Therefore, the integral box body adopts a frame structure, so that the reduction of the volume ratio can be avoided. In addition, under the condition of a multi-mooring mode, due to the fact that the incoming direction of wind wave flow is unstable, stress on each mooring point is unbalanced, the force of some mooring positions is insufficient, and the large mooring force does not need to be given by some mooring positions.
Disclosure of Invention
The invention aims to provide the eight diagrams spider net type three-dimensional net cage which has strong structural stability, can effectively avoid the problem of low volume ratio, can automatically remove microorganisms and dirt adhered to the surface of a net, enables the culture environment to be closer to the nature and improves the quality of cultured aquatic products.
The scheme adopted by the invention for realizing the purpose is as follows: the eight diagrams spider-web type three-dimensional net cage comprises a frame, a netting and an isolation net, wherein the surface of the frame is connected with transverse connecting rods and longitudinal connecting rods, the transverse connecting rods and the longitudinal connecting rods are arranged in a staggered mode, the netting is arranged inside the frame, the bottom of the frame is connected with a connecting cable, the tail end of the connecting cable is connected with a free suspended weight body, the lower surface of the free suspended weight body is connected with a self-mooring chain, and the tail end of the self-mooring chain is connected with a self-mooring weight. The net cage is designed into a eight diagrams cobweb type, and the quantitative stress analysis of the cobweb structure can prove that the structure is very stable, so that the reduction of the volume ratio is avoided, and the cultured aquatic products are extruded to die. The net cage is basically symmetrical and is stressed uniformly. The mooring net cage is connected with the seabed by a connecting cable at the bottom central point by adopting a single mooring mode, when the mooring net cage is away from the original position under the action of external force, the mooring net cage can rotate freely in all angles to follow tide to drift, so that the stress is minimum, the exchange of water bodies inside and outside the net cage can be accelerated, the bait and excrement in the net cage can be discharged out of the net cage as soon as possible, and the normal growth of aquatic products can be guaranteed.
Preferably, the frame is provided with symmetrical air bags on the outer side, the air bags are in strip shapes and extend to the bottom surface of the frame along the outer surface of the frame, and the top of the frame is provided with an air inlet hole. The gasbag in the frame outside can play corresponding effect to the ups and downs of box with a net, and the box with a net can corresponding come up when being full of gas in the gasbag, and can be comparatively easy according to coming of trend to drifting, alleviate the weight of box with a net in aqueous when still being favorable to catching, it is more high-efficient when catching, the box with a net can sink a bit after giving out the inside gas of gasbag, play unrestrained effect of anti-wind.
As preferred, the cover is equipped with the sliding sleeve on the longitudinal tie rod, is equipped with the ball between sliding sleeve and the longitudinal tie rod, is connected with the telescopic link between the adjacent sliding sleeve, and the telescopic link surface is connected with the brush, and the telescopic link is equipped with the second bearing with the junction of sliding sleeve. This setting makes the sliding sleeve on the longitudinal tie pole slide from top to bottom through the impact of rivers to the box with a net, clear brush the etting, under the normal condition, telescopic link between sliding sleeve and the sliding sleeve is in quiescent condition, when rivers strike to the sliding sleeve, the sliding sleeve passes through the ball and can upwards the drunkenness, also can drive the telescopic link motion simultaneously, the surperficial brush of gliding in-process telescopic link can contact with the etting, microorganism and the filth thoroughly cleaning with etting surface adhesion, avoid the etting to steep the jam that leads to the etting mesh in aqueous for a long time, the inside and outside rivers exchange speed of etting has accelerated, the quality of water condition has been improved in the box with the net, it takes place and spread to have reduced the fish disease.
Preferably, 3 layers of separation nets are arranged in the netting, the middle parts of the separation nets are provided with circulation holes, and the mesh size of the separation nets is smaller than that of the netting. The isolation net is arranged in the netting, so that the net cage can be divided into a plurality of culture spaces, the culture density of aquatic products is reduced, the growth of cultured organisms is facilitated, the culture yield is improved, the circulation holes formed in the middle of the isolation net can enable the aquatic products to shuttle in the netting, and the aquatic products are prevented from being accumulated at the bottom of the netting.
Preferably, the thickness of the isolation net is 10cm-15cm, at least 2 mounting holes are formed in the isolation net, and first bearings are embedded in the mounting holes. The separation net can play an effective supporting role to the netting within the thickness range, and the bearing in the mounting hole is used for inserting the cross, so that the effect of the internal components of the net cage is maximized.
Preferably, a symmetrical cross is arranged above the isolation net, a ring is arranged on the surface of the cross, an insertion rod is connected to the bottom of the cross and inserted into the first bearing, and the first bearing is installed in the isolation net. The separation net top is provided with the cross, and the ring on ten support surfaces can supply the aquatic products of breed to perch, shuttle back and forth, has increased the activity of aquaculture, and the cross still can be rotatory by oneself around first bearing under the effect of rivers for the flow of water in the netting avoids bait, faecal deposit in the netting, makes the aquaculture environment be close to nature more, is favorable to aquatic products to grow.
Preferably, the circular ring is provided with a plurality of fish inlets, the inside of the circular ring is annularly provided with the net bag, and the net bag is filled with bait. Aquatic products from advancing in the fish mouth trip income ring, with the intra-annular net bag extrusion contact of ring, bait in the net bag can scatter to the ring in supply the aquatic products of breed to eat, and the smell through bait can attract more aquatic products to swim to the ring in and carry out the ingestion to food simultaneously, still can reach the effect of feeding.
Compared with the prior art, the invention has the beneficial effects that: the integral three-dimensional frame structure is designed, so that the reduction of the volume rate is avoided; in addition, a single-point mooring mode is adopted, only one point needs to be well moored, drifting is carried out in compliance with tide, the sliding sleeve on the longitudinal connecting rod drives the telescopic rod to clean the netting through impact of the tide, blocking of netting meshes caused by long-time soaking of the netting in water is avoided, water exchange speed inside and outside the netting is accelerated, water quality conditions in the net cage are improved, fish diseases are reduced, deposition of bait and excrement in the netting is avoided due to the arrangement of the isolation net and the cross frame in the netting, the breeding environment is enabled to be close to the nature, and aquatic product growth is facilitated.
The eight diagrams cobweb type three-dimensional net cage provided by the technical scheme makes up the defects of the prior art, and is reasonable in design and convenient to operate.
Drawings
FIG. 1 is a front view of the eight diagrams spider net type three-dimensional net cage of the present invention;
FIG. 2 is a top view of the eight diagrams spider-web type three-dimensional net cage of the present invention;
FIG. 3 is a schematic structural view of the frame of the present invention; (removing the netting and the inner separation net);
FIG. 4 is a schematic view of the internal structure of the frame of the present invention;
FIG. 5 is a bottom view of the cross of the present invention;
FIG. 6 is a schematic view of the internal structure of the ring of the present invention;
FIG. 7 is a schematic view of the sliding sleeve and the telescopic rod of the present invention.
Description of reference numerals: 1, a frame; 2, netting; 3 connecting cables; 4 free deadweight; 5 self-mooring chains; 6 self-mooring weight; 7, an air bag; 8 air inlet holes; 9 transverse connecting rods; 10 longitudinal connecting rods; 11, a sliding sleeve; 12, telescoping a rod; 13 circular rings; 14 flow-through holes; 15 a cross; 16 an isolation mesh; 17 a first bearing; 18 inserting a rod; 19 balls; 20, a brush; 21 a second bearing; 22 mesh bag.
Detailed Description
The invention is described in further detail below with reference to examples and figures: example 1:
as shown in fig. 1-7, the eight diagrams spider-web type three-dimensional net cage comprises a frame 1, a netting 2 and an isolation net 16, wherein the surface of the frame 1 is connected with a transverse connecting rod 9 and a longitudinal connecting rod 10, the transverse connecting rod 9 and the longitudinal connecting rod 10 are arranged in a staggered manner, the netting 2 is arranged in the frame 1, the bottom of the frame 1 is connected with a connecting cable 3, the tail end of the connecting cable 3 is connected with a free suspended weight 4, the lower surface of the free suspended weight 4 is connected with a self-mooring chain 5, and the tail end of the self-mooring chain 5 is connected with a self-mooring pressing weight 6. The net cage is designed into a eight diagrams cobweb type, and the quantitative stress analysis of the cobweb structure can prove that the structure is very stable, so that the reduction of the volume ratio is avoided, and the cultured aquatic products are extruded to die. The net cage is basically symmetrical and is stressed uniformly. The mooring net cage is connected with the seabed by a connecting cable at the bottom central point by adopting a single mooring mode, when the mooring net cage is away from the original position under the action of external force, the mooring net cage can rotate freely in all angles to follow tide to drift, so that the stress is minimum, the exchange of water bodies inside and outside the net cage can be accelerated, the bait and excrement in the net cage can be discharged out of the net cage as soon as possible, and the normal growth of aquatic products can be guaranteed.
The outside of the frame 1 is provided with symmetrical air bags 7, the air bags 7 are strip-shaped, the air bags 7 extend to the bottom surface of the frame 1 along the outer surface of the frame 1, and the top of the frame 1 is provided with an air inlet 8. The gasbag in the frame outside can play corresponding effect to the ups and downs of box with a net, and the box with a net can corresponding come up when being full of gas in the gasbag, and can be comparatively easy according to coming of trend to drifting, alleviate the weight of box with a net in aqueous when still being favorable to catching, it is more high-efficient when catching, the box with a net can sink a bit after giving out the inside gas of gasbag, play unrestrained effect of anti-wind.
The cover is equipped with sliding sleeve 11 on the longitudinal tie rod 10, is equipped with ball 19 between sliding sleeve 11 and the longitudinal tie rod 10, is connected with telescopic link 12 between the adjacent sliding sleeve 11, and telescopic link 12 surface connection has brush 20, and the junction of telescopic link 12 and sliding sleeve 11 is equipped with second bearing 21. This setting makes the sliding sleeve on the longitudinal tie pole slide from top to bottom through the impact of rivers to the box with a net, clear brush the etting, under the normal condition, telescopic link between sliding sleeve and the sliding sleeve is in quiescent condition, when rivers strike to the sliding sleeve, the sliding sleeve passes through the ball and can upwards the drunkenness, also can drive the telescopic link motion simultaneously, the surperficial brush of gliding in-process telescopic link can contact with the etting, microorganism and the filth thoroughly cleaning with etting surface adhesion, avoid the etting to steep the jam that leads to the etting mesh in aqueous for a long time, the inside and outside rivers exchange speed of etting has accelerated, the quality of water condition has been improved in the box with the net, it takes place and spread to have reduced the fish disease.
The netting 2 is internally provided with 3 layers of separation nets 16, the middle parts of the separation nets 16 are provided with circulation holes 14, and the mesh size of the separation nets 16 is smaller than that of the netting 2. The isolation net is arranged in the netting, so that the net cage can be divided into a plurality of culture spaces, the culture density of aquatic products is reduced, the growth of cultured organisms is facilitated, the culture yield is improved, the circulation holes formed in the middle of the isolation net can enable the aquatic products to shuttle in the netting, and the aquatic products are prevented from being accumulated at the bottom of the netting.
The thickness of the isolation net 16 is 10cm-15cm, at least 2 mounting holes are formed in the isolation net 16, and first bearings 17 are embedded in the mounting holes. The separation net can play an effective supporting role to the netting within the thickness range, and the bearing in the mounting hole is used for inserting the cross, so that the effect of the internal components of the net cage is maximized.
A plurality of fish inlets are arranged on the circular ring 13, net bags 22 are annularly distributed in the circular ring 13, and baits are filled in the net bags 22. Aquatic products from advancing in the fish mouth trip income ring, with the intra-annular net bag extrusion contact of ring, bait in the net bag can scatter to the ring in supply the aquatic products of breed to eat, and the smell through bait can attract more aquatic products to swim to the ring in and carry out the ingestion to food simultaneously, still can reach the effect of feeding.
Example 2:
as shown in figures 1-7, in the actual use process of the eight diagrams spider-web type three-dimensional net cage, the bottom of a frame 1 is connected with a free suspended weight 4, the lower surface of the free suspended weight 4 is connected with a self-mooring ballast 6 through a self-mooring chain 5, a single mooring mode is adopted, when a mooring net cage is away from the original position under the action of external force, the mooring net cage can rotate freely in a full angle to follow tide to drift so as to achieve the minimum stress, a sliding sleeve 11 on a longitudinal connecting rod 10 can slide up and down on the longitudinal connecting rod 10 through the impact of water flow on the net cage to clean a net 2, the water flow exchange speed inside and outside the net 2 is accelerated, the water quality condition in the net cage is improved, an isolation net 16 in the net 2 plays a supporting role on the net 2, a cross frame 15 is arranged at the top of the isolation net 16, a circular ring 13 on the surface of the cross frame 15 can be used for the inhabiting and shuttling of the cultured aquatic products, the activity of the cultured aquatic products is increased, under the action of water flow, the cross 13 can rotate around the first bearing 18 automatically, so that the flow of water in the netting 2 is accelerated, the deposition of bait and excrement in the netting 2 is avoided, the culture environment is closer to the nature, and the growth of aquatic products is facilitated.
The conventional techniques in the above examples 1-2 are known to those skilled in the art and will not be described in detail herein.
The above embodiments are merely illustrative, and not restrictive, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.
Claims (2)
1. The eight diagrams spider-web type three-dimensional net cage comprises a frame (1), a netting (2) and an isolation net (16), and is characterized in that: the surface of the frame (1) is connected with transverse connecting rods (9) and longitudinal connecting rods (10), the transverse connecting rods (9) and the longitudinal connecting rods (10) are arranged in a staggered mode, a netting (2) is arranged inside the frame (1), the bottom of the frame (1) is connected with a connecting cable (3), the tail end of the connecting cable (3) is connected with a free suspended weight body (4), the lower surface of the free suspended weight body (4) is connected with a self-mooring chain (5), and the tail end of the self-mooring chain (5) is connected with a self-mooring ballast weight (6); symmetrical air bags (7) are arranged on the outer side of the frame (1), the air bags (7) are long-strip-shaped, the air bags (7) extend to the bottom surface of the frame (1) along the outer surface of the frame (1), and air inlet holes (8) are formed in the top of the frame (1); a sliding sleeve (11) is sleeved on the longitudinal connecting rod (10), a ball (19) is arranged between the sliding sleeve (11) and the longitudinal connecting rod (10), an expansion link (12) is connected between the adjacent sliding sleeves (11), a brush (20) is connected to the surface of the expansion link (12), and a second bearing (21) is arranged at the joint of the expansion link (12) and the sliding sleeve (11); the netting (2) is internally provided with 3 layers of isolation nets (16), the middle parts of the isolation nets (16) are provided with circulation holes (14), and the mesh size of the isolation nets (16) is smaller than that of the netting (2); the thickness of the isolation net (16) is 10cm-15cm, at least 2 mounting holes are formed in the isolation net (16), and first bearings (17) are embedded in the mounting holes; symmetrical crosses (15) are arranged above the isolation net (16), a circular ring (13) is arranged on the surface of each cross (15), an inserting rod (18) is connected to the bottom of each cross (15), the inserting rods (18) are inserted into first bearings (17), and the first bearings (17) are installed in the isolation net (16).
2. The eight diagrams spider net type three-dimensional net cage according to claim 1, characterized in that: a plurality of fish inlets are formed in the circular ring (13), net bags (22) are annularly distributed in the circular ring (13), and baits are filled in the net bags (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910801111.5A CN110402869B (en) | 2019-08-28 | 2019-08-28 | Eight diagrams spider net type stereo net cage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910801111.5A CN110402869B (en) | 2019-08-28 | 2019-08-28 | Eight diagrams spider net type stereo net cage |
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| CN110402869A CN110402869A (en) | 2019-11-05 |
| CN110402869B true CN110402869B (en) | 2021-08-10 |
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| CN201910801111.5A Active CN110402869B (en) | 2019-08-28 | 2019-08-28 | Eight diagrams spider net type stereo net cage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111374079B (en) * | 2020-03-18 | 2021-09-21 | 吴常文 | Movable management platform for bottom-sitting type columnar deep and far sea pasture |
| CN115474570B (en) * | 2022-09-16 | 2023-07-11 | 中国水产科学研究院南海水产研究所 | Net bottom structure of mariculture net cage, net containing net bottom structure and net lifting method of net |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2720810Y (en) * | 2004-08-23 | 2005-08-31 | 张畅 | Composite side-lifted netting cases |
| CN105165592A (en) * | 2015-10-16 | 2015-12-23 | 浙江大学 | Large-scale algae cultivation device |
| CN205962357U (en) * | 2016-06-28 | 2017-02-22 | 古国维 | Exempt from to trade net or easily trade net from flexible box with a net of polygon tension leg of mooring |
| CN108739578A (en) * | 2018-06-15 | 2018-11-06 | 黄骅市奥拓雷斯机电模具有限公司 | Rise and fall lift sea aquiculture net cage |
| WO2018232543A1 (en) * | 2017-06-21 | 2018-12-27 | Bronstein Garin Guillermo Octavio | Floating, closed, self-supporting fish-farming cage comprising a tubular membrane made of a polymer with high mechanical strength and low biofouling adhesion, and system of fish-farming cages |
-
2019
- 2019-08-28 CN CN201910801111.5A patent/CN110402869B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2720810Y (en) * | 2004-08-23 | 2005-08-31 | 张畅 | Composite side-lifted netting cases |
| CN105165592A (en) * | 2015-10-16 | 2015-12-23 | 浙江大学 | Large-scale algae cultivation device |
| CN205962357U (en) * | 2016-06-28 | 2017-02-22 | 古国维 | Exempt from to trade net or easily trade net from flexible box with a net of polygon tension leg of mooring |
| WO2018232543A1 (en) * | 2017-06-21 | 2018-12-27 | Bronstein Garin Guillermo Octavio | Floating, closed, self-supporting fish-farming cage comprising a tubular membrane made of a polymer with high mechanical strength and low biofouling adhesion, and system of fish-farming cages |
| CN108739578A (en) * | 2018-06-15 | 2018-11-06 | 黄骅市奥拓雷斯机电模具有限公司 | Rise and fall lift sea aquiculture net cage |
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| CN110402869A (en) | 2019-11-05 |
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