CN113261543B - Rotary type selective trawl equipment for marine protection animals - Google Patents
Rotary type selective trawl equipment for marine protection animals Download PDFInfo
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- CN113261543B CN113261543B CN202110534777.6A CN202110534777A CN113261543B CN 113261543 B CN113261543 B CN 113261543B CN 202110534777 A CN202110534777 A CN 202110534777A CN 113261543 B CN113261543 B CN 113261543B
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- 241001465754 Metazoa Species 0.000 title claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 239000013535 sea water Substances 0.000 claims description 23
- 230000005484 gravity Effects 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 4
- 241001233242 Lontra Species 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 241000238557 Decapoda Species 0.000 description 7
- 230000009471 action Effects 0.000 description 7
- 241000251468 Actinopterygii Species 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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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
- A01K73/00—Drawn nets
- A01K73/02—Trawling nets
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Abstract
The invention discloses rotary type selective trawl equipment for marine protection animals, and aims to provide rotary type selective trawl equipment for marine protection animals, which can release large-size marine animals entering a net bag, and can effectively solve the problem that a release port can be automatically opened to cause failure of a selective release device when the trawl operation speed of the conventional selective release device is too high. The trawl comprises a trawl, wherein the trawl comprises a rear net bag positioned at the rear part of the trawl, the rear net bag is cylindrical, and the lower part of the side wall of the rear net bag is provided with a release port; rotary type marine protection animal selection device, rotary type marine protection animal selection device include the guide rope, set up at the anterior guide ring of back pocket, set up interior locating part and outer locating part on the guide rope, set up the rotation fence grid tray in the back pocket, be used for sheltering from the otter board that shelters from of release mouth and be located the rivers resistance in the back pocket outside.
Description
Technical Field
The invention relates to a selective fishing device, in particular to rotary type selective trawl equipment for marine protection animals.
Background
The trawl is one of the current common marine fishing devices, and the trawl is dragged in seawater to advance by using the motion of a ship, so that the trawl is forced to enter a net bag through fishing objects such as fishes, shrimps, crabs and the like in a water area, and the aim of fishing is fulfilled. The trawl net forces the trawl net to pass through marine animals such as fishes, shrimps and crabs in the water area to enter the net bag, which has great damage to the marine animals, especially to marine protection animals. Therefore, at present, in the research of trawl fishing gear, the selective release device is a very important research object, especially the selective release device is used as a release device for protecting animals in the sea.
The prior selective release device in the trawl fishing gear generally adopts a mode of arranging a fence and a release port in a net bag to release marine protection animals, the fence of the selective release device is divided into a fixed fence and a rotary fence plate, wherein the rotary fence plate uses the marine protection animals to aim at the marine animals with larger body sizes, the rotary fence plate is arranged in the net bag through an elastic piece (fishes and shrimps with smaller body sizes can pass through the fence, and the marine animals with larger body sizes can not pass through the fence), when the marine animals with larger body sizes (including the marine protection animals) enter the net bag and abut against the rotary fence plate under the action of water flow, the elastic force of the elastic piece is overcome to enable the rotary fence plate to move backwards, the release port is opened, so that the marine animals with larger body sizes escape out through the release port, then the rotary fence plate is reset under the action of the elastic piece to close the release port again, therefore, selective fishing is realized, so that marine animals and marine fishery can be protected for sustainable development; however, the existing rotating barrier plate has the following defects that in the trawling operation process, under different trawling operation speeds, the barriers are different in water flow acting force, the higher the trawling operation speed is, the higher the water acting force is, and once the trawling operation speed is too high and the water acting force is too large, the rotating barrier plate can move backwards under the action force of the elastic piece, the release port is automatically opened, so that the fishing objects are also released together, and the selective release device fails.
Disclosure of Invention
The invention aims to provide rotary type selective trawl equipment for marine protection animals, which not only can release large marine animals entering a net bag, but also can effectively solve the problem that the selective release device fails due to the fact that a release port is possibly opened automatically when the trawl operation speed of the conventional selective release device is too high.
The technical scheme of the invention is as follows:
a rotary marine protection animal selective trawl apparatus, comprising:
the trawl comprises a front net bag positioned at the front part of the trawl and a rear net bag positioned at the rear part of the trawl, the rear net bag is cylindrical, and the lower part of the side wall of the rear net bag is provided with a release port;
the rotary type marine protection animal selection device comprises a guide rope, a guide ring arranged at the front part of a rear net bag, an inner limiting part and an outer limiting part which are arranged on the guide rope, a rotary fence plate arranged in the rear net bag, a shielding net plate for shielding a release port and a water flow resistance part positioned at the outer side of the rear net bag, wherein the upper part of the rotary fence plate is rotatably connected with the upper part of the side wall of the rear net bag, the shielding net plate and the tail end of the rear net bag are positioned at the same side of the rotary fence plate, the shielding net plate is fixed at the lower part of the rotary fence plate, the guide ring is arranged at the lower part of the side wall of the rear net bag, the guide rope passes through the corresponding guide ring, one end of the guide rope is connected with the lower part of the rotary fence plate, the other end of the guide rope is connected with the water flow resistance part, the inner limiting part is positioned at the inner side of the rear net bag, and the outer limiting part is positioned at the outer side of the rear net bag,
when the inner limiting piece abuts against the guide ring, the shielding screen plate shields the release opening; when the outer limiting part abuts against the guide ring, the release port and the front net bag are located on the same side of the shielding net plate.
In the trawl operation process, the trawl and the rotary type marine protection animal selection device move forward in seawater, and under the action of seawater resistance, the water flow resistance piece moves towards the rear end of the net bag and drives the lower part of the rotating fence plate to rotate towards the direction of the front net bag through the guide rope until the inner limiting piece abuts against the guide ring.
The rotary type selective trawl equipment for the marine protection animals enters catching objects in the net bags in the trawl operation process, wherein the catching objects (such as fishes and shrimps) capable of rotating the fence plates can enter rear net bags through the rotating fence plates; the marine animals which have larger body sizes and cannot pass through the rotating fence plate abut against the rotating fence plate, at the moment, the rotating fence plate is shielded by the marine animals and is subjected to rapid increase of seawater resistance, so that the seawater resistance received by the water flow resistance part is overcome, the lower part of the rotating fence plate rotates towards the tail end of the backward net bag until the outer limiting part abuts against the guide ring, at the moment, the release port and the front net bag are positioned on the same side of the shielding net plate to open the release port, so that the marine animals blocked by the rotating fence plate escape out through the release port, and the marine animals with larger body sizes released into the net bag are released; and then, the water flow resistance piece moves towards the rear end of the rear net bag under the action of seawater resistance again, and drives the rotating fence plate and the shielding net plate to rotate towards the direction of the front net bag through the guide rope until the inner limiting piece abuts against the guide ring, so that the release port is shielded by the shielding net plate again.
On the other hand, because the rotary type selective trawl equipment for the marine protection animals utilizes the difference of seawater resistance received by the water flow resistance piece and the rotary fence plate (in the trawl operation process, the seawater resistance received by the water flow resistance piece is larger than the seawater resistance received by the rotary fence plate and the shielding net plate), the water flow resistance piece moves towards the rear end of the net bag and drives the rotary fence plate to rotate towards the front net bag through the guide rope, thus, the trawl operation speed is faster, the seawater resistance received by the water flow resistance piece and the rotary fence plate is simultaneously increased, the rotary fence plate is not influenced by the fast trawl operation speed, the problem that the release port is automatically opened due to the fact that the rotary fence plate moves towards the rear end of the net bag because of the fast trawl operation speed is solved, and the problem that the release port is automatically opened when the trawl operation speed of the existing selective release device is too fast can be effectively solved, leading to the problem of selective release device failure.
Preferably, the water flow resistance member comprises a plurality of flow blocking plates parallel to each other and a connecting member for integrally connecting the flow blocking plates.
Preferably, the rear end edge of the shielding mesh plate is provided with a plurality of rollers, and the rear end of the shielding mesh plate is in contact with the inner wall of the rear mesh bag through the rollers. Therefore, resistance of the shielding net plate when the rear net bag rotates is reduced.
Preferably, the lower portion of the rotating fence plate is inclined toward the end of the rear net bag when the outer limiting member abuts on the guide ring.
Preferably, the upper portion of the rotating fence plate is inclined towards the end of the rear pocket when the inner retainer is against the guide ring.
Preferably, the buoyancy of the water flow resistance member is equal to the gravity of the water flow resistance member, or the buoyancy of the water flow resistance member is slightly greater than the gravity of the water flow resistance member, or the buoyancy of the water flow resistance member is slightly smaller than the gravity of the water flow resistance member.
The invention has the beneficial effects that: the large-size marine animals entering the net bag can be released, and the problem that the selective release device fails due to the fact that the release port is opened automatically when the trawl operation speed of the conventional selective release device is too high can be effectively solved.
Drawings
Fig. 1 is a partial structural schematic view of a rotary marine protection animal selective trawl apparatus of the present invention.
Fig. 2 is a partially enlarged view of a point a in fig. 1.
Fig. 3 is a view from the direction B in fig. 1.
In the figure:
the trawl net 1, the front net bag 1.1, the rear net bag 1.2 and the release port 1.3;
rotary type marine protection animal selecting device 2, guide ring 2.1, guide rope 2.2, a net section of thick bamboo that floats 2.3, outer lane 2.31, rivers resistance 2.4 shelter from otter board 2.5, interior locating part 2.6, outer locating part 2.7, go-between 2.8.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme and are not construed as limiting the scheme of the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: as shown in fig. 1, 2 and 3, a rotary type selective trawl apparatus for marine protection animals comprises a trawl 1 and a rotary type selection device for marine protection animals 2. The trawl comprises a front bag 1.1 at the front of the trawl and a rear bag 1.2 at the rear of the trawl. The front end of the front net bag is a net opening of the trawl. The rear net bag is cylindrical, and the lower part of the side wall of the rear net bag is provided with a release port 1.3.
The rotary type marine protection animal selection device 2 comprises a guide rope 2.2, a guide ring 2.1 arranged at the front part of the rear net bag, an inner limiting part 2.6 and an outer limiting part 2.7 arranged on the guide rope, a rotary fence plate 2.3 arranged in the rear net bag, a shielding net plate 2.5 used for shielding a release port and a water flow resistance part 2.4 positioned at the outer side of the rear net bag. The upper part of the rotary fence plate is rotatably connected with the upper part of the side wall of the rear net bag, in the embodiment, the upper part of the side wall of the rear net bag is provided with a connecting ring 2.8, and the upper part of the rotary fence plate is rotatably connected with the connecting ring so as to rotatably connect the upper part of the rotary fence plate with the upper part of the side wall of the rear net bag. The rotary fence plate is circular. The edge of the rotary fence plate is provided with a circle of round outer ring 2.31. The shielding net plate and the tail end of the rear net bag are positioned on the same side of the rotating fence plate, and the shielding net plate is fixed at the lower part of the rotating fence plate. The guide ring is arranged at the lower part of the side wall of the rear net bag. The floating net cylinder and the water flow resistance piece are both positioned behind the guide ring. The guide rope passes through the corresponding guide ring, one end of the guide rope is connected with the lower part of the rotating fence plate, and the other end of the guide rope is connected with the water flow resistance piece. The inner limiting piece is located on the inner side of the rear net bag, and the outer limiting piece is located on the outer side of the rear net bag.
As shown in FIG. 1, when the inner position-limiting member abuts against the guide ring, the shielding net plate shields the release opening.
When the outer limiting part abuts against the guide ring, the release port and the front net bag are located on the same side of the shielding net plate.
In the trawl operation process, the trawl and the rotary type marine protection animal selection device move forward in seawater, and under the action of seawater resistance, the water flow resistance piece moves towards the rear end of the net bag and drives the lower part of the rotating fence plate to rotate towards the direction of the front net bag through the guide rope until the inner limiting piece abuts against the guide ring. In the trawl operation process, the seawater resistance of the water flow resistance piece is larger than the seawater resistance of the rotating fence plate and the shielding net plate.
The rotary type selective trawl equipment for the marine protection animals of the embodiment enters the fishing objects in the net bag in the trawl operation process, wherein the fishing objects (such as fishes and shrimps) capable of passing through the rotating fence plate can enter the rear net bag through the rotating fence plate; the marine animals which have larger body sizes and cannot pass through the rotating fence plate abut against the rotating fence plate, at the moment, the rotating fence plate is shielded by the marine animals and is subjected to rapid increase of seawater resistance, so that the seawater resistance received by the water flow resistance part is overcome, the lower part of the rotating fence plate rotates towards the tail end of the backward net bag until the outer limiting part abuts against the guide ring, at the moment, the release port and the front net bag are positioned on the same side of the shielding net plate to open the release port, so that the marine animals blocked by the rotating fence plate escape out through the release port, and the marine animals with larger body sizes released into the net bag are released; and then, the water flow resistance piece moves towards the rear end of the rear net bag under the action of seawater resistance again, and drives the rotating fence plate and the shielding net plate to rotate towards the direction of the front net bag through the guide rope until the inner limiting piece abuts against the guide ring, so that the release port is shielded by the shielding net plate again.
On the other hand, because the rotary type selective trawl equipment for the marine protection animals utilizes the difference of seawater resistance received by the water flow resistance piece and the rotary fence plate (in the trawl operation process, the seawater resistance received by the water flow resistance piece is larger than the seawater resistance received by the rotary fence plate and the shielding net plate), the water flow resistance piece moves towards the rear end of the net bag and drives the rotary fence plate to rotate towards the front net bag through the guide rope, thus, the trawl operation speed is faster, the seawater resistance received by the water flow resistance piece and the rotary fence plate is simultaneously increased, the rotary fence plate is not influenced by the fast trawl operation speed, the problem that the release port is automatically opened due to the fact that the rotary fence plate moves towards the rear end of the net bag because of the fast trawl operation speed is solved, and the problem that the release port is automatically opened when the trawl operation speed of the existing selective release device is too fast can be effectively solved, leading to the problem of selective release device failure.
In this embodiment, the water flow resistance member includes a plurality of spoilers parallel to each other and a connecting member connecting the spoilers together.
When the outer limiting part is pressed against the guide ring, the lower part of the rotating fence plate inclines towards the tail end of the net bag. When the inner limiting piece is abutted against the guide ring, the upper part of the rotating fence plate is inclined towards the tail end of the net bag.
The buoyancy of the water flow resistance piece is equal to the gravity of the water flow resistance piece, or the buoyancy of the water flow resistance piece is slightly larger than the gravity of the water flow resistance piece, or the buoyancy of the water flow resistance piece is slightly smaller than the gravity of the water flow resistance piece.
The edge of the rear end of the shielding screen plate is provided with a plurality of rollers, and the rear end of the shielding screen plate is in contact with the inner wall of the rear net bag through the rollers. Therefore, the resistance of the shielding mesh plate when the rear mesh bag rotates is favorably reduced.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (7)
1. A rotary marine protection animal selective trawl apparatus, comprising:
the trawl comprises a front net bag positioned at the front part of the trawl and a rear net bag positioned at the rear part of the trawl, the rear net bag is cylindrical, and the lower part of the side wall of the rear net bag is provided with a release port;
the rotary type marine protection animal selection device comprises a guide rope, a guide ring arranged at the front part of a rear net bag, an inner limiting part and an outer limiting part which are arranged on the guide rope, a rotary fence plate arranged in the rear net bag, a shielding net plate for shielding a release port and a water flow resistance part positioned at the outer side of the rear net bag, wherein the upper part of the rotary fence plate is rotatably connected with the upper part of the side wall of the rear net bag, the shielding net plate and the tail end of the rear net bag are positioned at the same side of the rotary fence plate, the shielding net plate is fixed at the lower part of the rotary fence plate, the guide ring is arranged at the lower part of the side wall of the rear net bag, the guide rope passes through the corresponding guide ring, one end of the guide rope is connected with the lower part of the rotary fence plate, the other end of the guide rope is connected with the water flow resistance part, the inner limiting part is positioned at the inner side of the rear net bag, and the outer limiting part is positioned at the outer side of the rear net bag,
when the inner limiting piece abuts against the guide ring, the shielding screen plate shields the release opening; when the outer limiting part abuts against the guide ring, the release port and the front net bag are located on the same side of the shielding net plate.
2. A rotary marine animal selective trawl apparatus according to claim 1, wherein during trawl operation, the trawl and the rotary marine animal selecting means are moved forward in sea water, and the water flow resistance member moves toward the rear end of the rear net bag by the resistance of sea water, and drives the lower portion of the rotating fence plate to rotate toward the front net bag by the guide rope until the inner position limiting member abuts on the guide ring.
3. A rotary marine animal selective trawl apparatus according to claim 1, wherein said flow resistance member comprises a plurality of flow blocking plates parallel to each other and a connecting member integrally connecting the flow blocking plates.
4. A rotary marine animal selective trawl apparatus according to claim 1, 2 or 3, wherein the rear end edge of the shielding net plate is provided with a plurality of rollers, and the rear end of the shielding net plate is contacted with the inner wall of the rear net bag through the rollers.
5. A rotary marine animal selective trawl apparatus according to claim 1, 2 or 3, wherein the lower part of the rotary fence plate is inclined towards the end of the rear net bag when the outer stop abuts against the guide ring.
6. A rotary marine animal selective trawl apparatus according to claim 1, 2 or 3, wherein the upper part of the rotary fence plate is inclined towards the end of the rear net bag when the inner stop abuts the guide ring.
7. A rotary marine animal selective trawl apparatus according to claim 1, 2 or 3, wherein the buoyancy of the flow resistance is equal to the gravity of the flow resistance, or the buoyancy of the flow resistance is slightly greater than the gravity of the flow resistance, or the buoyancy of the flow resistance is slightly less than the gravity of the flow resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110534777.6A CN113261543B (en) | 2021-05-17 | 2021-05-17 | Rotary type selective trawl equipment for marine protection animals |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110534777.6A CN113261543B (en) | 2021-05-17 | 2021-05-17 | Rotary type selective trawl equipment for marine protection animals |
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| CN113261543A CN113261543A (en) | 2021-08-17 |
| CN113261543B true CN113261543B (en) | 2022-06-24 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030045898A (en) * | 2001-12-03 | 2003-06-12 | 대한민국(관리부서:국립수산과학원) | Fishing gear with escaping equipment for small fish |
| CN104285918A (en) * | 2014-09-23 | 2015-01-21 | 浙江海洋学院 | Selective catch separating device for trawl |
| CN205727709U (en) * | 2016-06-08 | 2016-11-30 | 辽宁省海洋水产科学研究院 | A kind of Fish, large jellyfish selective fishing netting gear |
| CN106719481A (en) * | 2016-12-06 | 2017-05-31 | 浙江省海洋水产研究所 | A kind of Eco-friendly Trawl gear Choice tests device |
| CN212488060U (en) * | 2020-05-27 | 2021-02-09 | 中国水产科学研究院东海水产研究所 | Anti-blocking releasing device for continuous fishing of euphausia superba trawl |
| JP2021035343A (en) * | 2019-08-30 | 2021-03-04 | ニチモウ株式会社 | Flapper in surface middle layer trawl net |
-
2021
- 2021-05-17 CN CN202110534777.6A patent/CN113261543B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030045898A (en) * | 2001-12-03 | 2003-06-12 | 대한민국(관리부서:국립수산과학원) | Fishing gear with escaping equipment for small fish |
| CN104285918A (en) * | 2014-09-23 | 2015-01-21 | 浙江海洋学院 | Selective catch separating device for trawl |
| CN205727709U (en) * | 2016-06-08 | 2016-11-30 | 辽宁省海洋水产科学研究院 | A kind of Fish, large jellyfish selective fishing netting gear |
| CN106719481A (en) * | 2016-12-06 | 2017-05-31 | 浙江省海洋水产研究所 | A kind of Eco-friendly Trawl gear Choice tests device |
| JP2021035343A (en) * | 2019-08-30 | 2021-03-04 | ニチモウ株式会社 | Flapper in surface middle layer trawl net |
| CN212488060U (en) * | 2020-05-27 | 2021-02-09 | 中国水产科学研究院东海水产研究所 | Anti-blocking releasing device for continuous fishing of euphausia superba trawl |
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