CN104686412B - Marine fish release ship - Google Patents
Marine fish release ship Download PDFInfo
- Publication number
- CN104686412B CN104686412B CN201510056346.8A CN201510056346A CN104686412B CN 104686412 B CN104686412 B CN 104686412B CN 201510056346 A CN201510056346 A CN 201510056346A CN 104686412 B CN104686412 B CN 104686412B
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- Prior art keywords
- placing tube
- dividing plate
- axostylus axostyle
- block
- vertical
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- 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)
- Farming Of Fish And Shellfish (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Marine Sciences & Fisheries (AREA)
- Zoology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
Abstract
The invention discloses a marine fish release ship and aims to provide a release ship which is low in labor intensity, high in release efficiency, good in release effect and capable of effectively increasing the release survival rate of fish fry. The marine fish release ship comprises a counterweight, a connecting shaft rod, a vertical guide rod arranged on a ship body, a guide sleeve slidably arranged on the vertical guide rod, a vertical sleeve body arranged on the ship body and an accommodating barrel slidably arranged in the vertical sleeve body, wherein an upper end and a lower end of the vertical sleeve body are open, the lower end of the vertical sleeve body extends downwards and penetrates through a bottom surface of the ship body, and the vertical sleeve body is hermetically connected with the bottom surface of the ship body; an upper end and a lower end of the accommodating barrel are open, and an inner ring-shaped limiting block is arranged at a lower part of an inner side surface of the accommodating barrel; a partition is arranged below the inner ring-shaped limiting block in the accommodating barrel; a plurality of water inlet through holes penetrating through an upper surface and a lower surface of the partition are formed in the partition.
Description
Technical field
The present invention relates to a kind of releasing device is and in particular to a kind of marine fishes releasing ship.
Background technology
Fish ocean enhancement releasing refers to fish after carrying out artificial propagation nursery, then releases into stock of fish appearance
In the natural marine waters of decline, so that fish Natural Population is recovered, then carry out the fishery mode of rational fishing.
The general method of fish-releasing is that seed is contained in special perforated ship cargo ship at present, is transported to by cargo ship and puts
Stream marine site；Followed by the string bag, seed is transferred in the bucket with water, marine greatly followed by being poured onto bucket.Current is this
Fish-releasing method needs to put into a large amount of manpowers, and its high labor intensive, to release efficiency low；And due to cargo ship live well and sea
Plane has certain altitude poor, and when releasing, fry, by throwing in the air to marine it is also possible to cause fry tumble injury, leads to release seed vigor
Decline even dead, have a strong impact on and release effect.
Content of the invention
The invention aims to overcoming deficiency of the prior art, not only labour intensity is low, release effect to provide one kind
Rate is high, and can effectively improve fish fry release survival rate, release the good marine fishes releasing ship of effect.
The technical scheme is that
A kind of marine fishes releasing ship, including counterweight, connects axostylus axostyle, is arranged on the vertical guide rod on hull, slidably sets
Put the guide pin bushing on vertical guide rod, the vertical body being arranged on hull and be slidably arranged on and vertical cover internal placing tube；
The upper and lower ends opening of described vertical body, and the lower end of vertical body down extends and run through hull bottom surface, vertical body with
Hull is tightly connected between bottom surface, under vertical body medial surface top is provided with upper limit block and is located at below upper limit block
Positive stop；The upper and lower ends opening of described placing tube, is provided with outer on placing tube lateral surface, between upper and lower positive stop
Annular stop block, placing tube medial surface bottom is provided with annular limited block；In placing tube, it is provided with below annular limited block
Dividing plate, and this dividing plate can move down along placing tube, and pass through the lower ending opening of placing tube, described dividing plate is provided with some running through
The inlet through hole of dividing plate upper and lower surface；Described connection axostylus axostyle be vertically arranged, connect axostylus axostyle lower end stretch in placing tube, and with every
Plate is connected；The middle part connecting axostylus axostyle is splined shaft, and top is polished rod axle, and splined shaft is coaxially disposed with polished rod axle, described light
Connecting bushing is arranged with bar axle, splined shaft is arranged with splined sleeve, and the internal diameter of splined sleeve is more than polished rod axle external diameter, even
Spindle set and splined sleeve are located above placing tube；It is connected by horizontal brace rod between described connecting bushing and guide pin bushing, institute
State polished rod axle and be provided with annular stop projection and lower annular stop projection, and connecting bushing is located at upper and lower annular stop projection
Between, the spacing between lower annular stop projection and polished rod axle lower end is more than the axial length of splined sleeve；Described splined sleeve
It is connected with hull by the first connector；It is provided with the agitating plate parallel with being connected axostylus axostyle, this agitating plate in described placing tube
It is connected by the second connector with being connected between axostylus axostyle；It is provided with driving impeller below described dividing plate, and drive impeller to be fixed on
On dividing plate, this driving impeller includes some blades uniform around connection axostylus axostyle circumference；On described vertical guide rod, it is located at below guide pin bushing
It is provided with the compression spring that guide pin bushing can be made up to elapse, on vertical guide rod lateral surface, below guide pin bushing, be additionally provided with circular orientation block,
And when guide pin bushing moves down and is resisted against on circular orientation block, described connection axostylus axostyle will move down under Gravitative Loads,
And make lower annular stop projection be resisted against splined sleeve upper end.
The marine fishes releasing ship of this programme can be realized boating type and automatically release, and carry out certainly during hull navigation
Move and release, not only labour intensity is low for it, release efficiency high；And because fry is by throwing in the air when can release in effectively solving prior art
To marine, it is likely to result in fry tumble injury, lead to release seed vigor decline even death, have a strong impact on the problem releasing effect；
Thus that improves fish fry releases survival rate, release effect good.
Preferably, when outer annular limited block is resisted against on lower limit block, and lower annular stop projection is resisted against spline
During sleeve upper end, the upper end of described splined shaft is located at below splined sleeve, and dividing plate is simultaneously located at below placing tube, and dividing plate and placement
Spacing between cylinder lower end is more than the spacing between splined shaft upper end and splined sleeve.
Due to, after splined shaft is separated with splined sleeve, driving impeller will be driven by water impact during hull navigation
Connect axostylus axostyle and agitating plate rotates；The large yellow croaker seed being trapped in placing tube can be expelled in agitating plate rotation process and put
Put cylinder, it is to avoid seed is trapped in placing tube large yellow croaker；But in agitating plate rotation process, if the large yellow croaker seed in placing tube
Substantial amounts of dense distribution, then agitating plate may strike large yellow croaker seed and make large yellow croaker seed injured；This programme is by rheum officinale
Fry kind expels placing tube, it is to avoid while large yellow croaker seed is trapped in placing tube, can also be prevented effectively from agitating plate and hit
Hit large yellow croaker seed and make the injured problem of large yellow croaker seed.
This programme structure makes dividing plate separate with placing tube, and be located at placing tube below when, splined shaft still with spline housing
Cylinder cooperation；So separate with placing tube in dividing plate a period of time in, impeller will not drive connection axostylus axostyle and agitating plate rotation, and
After dividing plate is separated with placing tube, the large yellow croaker seed in placing tube is banished in marine site in a large number, thus when splined shaft is located at
After splined sleeve separates, generally only can be detained the large yellow croaker seed of small part in placing tube, so then can realize being detained
Large yellow croaker seed in placing tube expels placing tube, it is to avoid while large yellow croaker seed is trapped in placing tube, acceptable
It is prevented effectively from agitating plate and strikes large yellow croaker seed and make the injured problem of large yellow croaker seed.
Preferably, horizontal brace rod is provided with link, described counterweight is provided with hook；And when counterweight passes through described extension
When hook is hung on link, the gravity of counterweight will overcome the elastic force of compression spring, make guide pin bushing move down and be resisted against annular to determine
On the block of position.
Preferably, when outer annular limited block is resisted against on upper limit block, the lower end of placing tube is located at vertical body
Interior；When outer annular limited block is resisted against on lower limit block, the lower end of placing tube is located at the lower section of vertical body.When outer annular
When limited block is resisted against on upper limit block, fish-releasing device is released；Now, the lower end of placing tube is located at vertical covering
In vivo, the flow resistance of hull can so be reduced.When outer annular limited block is resisted against on lower limit block, at fish-releasing device
In releasing state；Now, the lower end of placing tube is located at the lower section of vertical body, is so conducive to smoothly making fish uniformly put
Stream.
Preferably, blade is in circular arc.
Preferably, the plate face of agitating plate radially extending along connection axostylus axostyle.
Preferably, the spacing between agitating plate and placing tube inwall is more than the height of projection of annular limited block.
The invention has the beneficial effects as follows: have that labour intensity is low, release efficiency high, and putting of fish fry can be effectively improved
Stream survival rate, releases the good feature of effect.
Brief description
Fig. 1 is a kind of partial structural diagram of marine fishes releasing ship of the present invention.
Fig. 2 is dividing plate and a kind of structural representation of impeller of the present invention.
Fig. 3 be the present invention marine fishes releasing ship release one of process partial structural diagram.
In figure: hull 1, placing tube 2, outer annular limited block 21, annular limited block 22, dividing plate 3, inlet through hole 31, drive
Movable vane wheel 4, blade 41, vertical body 5, upper limit block 51, lower limit block 52, compression spring 6, vertical guide rod 7, guide pin bushing
71st, circular orientation block 72, connects axostylus axostyle 8, polished rod axle 81, splined shaft 82, upper annular stop projection 83, lower annular stop projection
84, connecting bushing 9, horizontal brace rod 10, link 11, agitating plate 12, splined sleeve 13, counterweight 14.
Specific embodiment
With specific embodiment, the present invention is described in further detail below in conjunction with the accompanying drawings:
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of marine fishes releasing ship includes counterweight 14, connects axostylus axostyle 8, is arranged on hull 1
On vertical guide rod 7, be slidably arranged on the guide pin bushing 71 on vertical guide rod, be arranged on vertical body 5 on hull and slidably
It is arranged on the internal placing tube 2 of vertical set.Vertically body is cylindrical shape.The vertically upper and lower ends opening of body.Vertical body
Lower end down extends and runs through hull bottom surface.Vertically it is tightly connected between body and hull bottom surface；And when hull travels the water surface
When upper, the lower end of vertical body is located at below the water surface, and the upper end of vertical body is located above the water surface.Vertically body medial surface top
It is provided with upper limit block 51 and be located at the lower limit block 52 below upper limit block.
Placing tube is cylindrical shape.The upper and lower ends opening of placing tube.On placing tube lateral surface, it is located at upper and lower positive stop
Between be provided with outer annular limited block 21.Placing tube medial surface bottom is provided with annular limited block 22.In placing tube, it is located at annular
It is provided with dividing plate 3 below limited block, and this dividing plate can move down along placing tube, and pass through the lower ending opening of placing tube.On dividing plate
It is provided with some inlet through hole 31 running through dividing plate upper and lower surface.
Connect axostylus axostyle to be vertically arranged.The lower end connecting axostylus axostyle is stretched in placing tube, and is connected with dividing plate.Connect axostylus axostyle
Upper end up extends and is located above placing tube.Connect axostylus axostyle to be coaxially disposed with placing tube.The middle part connecting axostylus axostyle is splined shaft
82, top is polished rod axle 81, and splined shaft is coaxially disposed with polished rod axle.Connecting bushing 9 is arranged with polished rod axle.Cover on splined shaft
It is provided with splined sleeve 13, and the internal diameter of splined sleeve is more than polished rod axle external diameter.Connecting bushing and splined sleeve are located in placing tube
Side.It is connected by horizontal brace rod 10 between connecting bushing and guide pin bushing.Polished rod axle be provided with annular stop projection 83 and under
Annular stop projection 84, and connecting bushing is between upper and lower annular stop projection.Connect axostylus axostyle to turn with respect to connecting bushing
Dynamic.Spacing between lower annular stop projection and polished rod axle lower end is more than the axial length of splined sleeve.Splined sleeve passes through the
A connection piece is connected with hull.
It is provided with the agitating plate 12 parallel with being connected axostylus axostyle in placing tube.This agitating plate passes through second with being connected between axostylus axostyle
Connector is connected.The plate face of agitating plate radially extends along connection axostylus axostyle.Spacing between agitating plate and placing tube inwall is big
Height of projection in annular limited block.
It is provided with driving impeller 4 below dividing plate, and drive impeller to be fixed on dividing plate.This driving impeller include some around connection
The uniform blade 41 of axostylus axostyle circumference.Each blade is fixed on dividing plate.Blade is in circular arc, and blade is equal with connecting shaft rod axis
OK.
Vertically on guide rod, it is provided with, below guide pin bushing, the compression spring 6 that guide pin bushing can be made up to elapse.This compression spring can carry
Dynamic guide pin bushing, horizontal brace rod, connect axostylus axostyle, and dividing plate and placing tube up move, and make outer annular limited block be resisted against upper limit
On block.Vertically on guide rod lateral surface, below guide pin bushing, it is additionally provided with circular orientation block 72.
Horizontal brace rod is provided with link 11.Counterweight is provided with hook.As shown in figure 3, pass through described hook when counterweight hanging
When putting on link, the gravity of counterweight will overcome the elastic force of compression spring, so that guide pin bushing is moved down and be resisted against circular orientation block
On.
As shown in figure 3, when guide pin bushing moves down and is resisted against on circular orientation block, described connection axostylus axostyle will be from recast
With under move down, and make lower annular stop projection be resisted against splined sleeve upper end.When guide pin bushing is resisted against on circular orientation block, and
When lower annular stop projection is resisted against splined sleeve upper end, between connecting bushing and upper and lower annular stop projection, all leave gap.
As shown in Figure 1, Figure 3, when outer annular limited block is resisted against on lower limit block, and lower annular stop projection is resisted against
During splined sleeve upper end；The upper end of splined shaft is located at below splined sleeve, and dividing plate is simultaneously located at below placing tube, and dividing plate and placement
Spacing between cylinder lower end is more than the spacing between splined shaft upper end and splined sleeve.In the present embodiment, when outer annular limited block
It is resisted against on lower limit block, and when lower annular stop projection is resisted against splined sleeve upper end；Between dividing plate and placing tube lower end
Spacing be 3-8 times of spacing between splined shaft upper end and splined sleeve.When outer annular limited block is resisted against upper limit block
When upper, the lower end of placing tube is located at vertical covering in vivo.When outer annular limited block is resisted against on lower limit block, under placing tube
End is located at the lower section of vertical body.
Hull travels on the water surface, and when annular limited block is resisted against on upper limit block outward；Dividing plate is located at below the water surface, puts
The upper end putting cylinder is located above the water surface.Due to hull travel the water surface on when, dividing plate be located at the water surface below, and dividing plate be provided with into
Water through hole；Thus seawater can automatically in placing tube, and the seawater in placing tube during hull travels with extraneous
The seawater moment keeps connection；So there is no need to additionally arrange water pump for placing tube water supply, energy saving.
The concrete application process of the marine fishes releasing ship of the present invention is as follows:
First, as shown in figure 1, the fish fry of artificial breeding is put in placing tube；Then together transport finger with ship
Fixed releases marine site；
Second, as shown in figure 3, operator counterweight is hung on link by hook, now the gravity of counterweight will overcome
The elastic force of compression spring, makes guide pin bushing move down and is resisted against on circular orientation block.When guide pin bushing moves down and is resisted against annular
When on locating piece, connect axostylus axostyle and placing tube will move down under Gravitative Loads；When outer annular limited block is resisted against upper limit
When on block, placing tube stops moving down；Now, the lower end of placing tube is located at the lower section of vertical body.Instantly annular stop projection
When being resisted against splined sleeve upper end, dividing plate is located at below placing tube.
After dividing plate is located at below placing tube, the fish fry in placing tube will be swum out of by placing tube lower port, discharge to
In marine site.
Drive impeller will be produced rotating tendency by water impact during hull navigation；When dividing plate move down certain
After distance, splined shaft is separated with splined sleeve；Now, impeller is driven connection axostylus axostyle and agitating plate will to be driven to turn by water impact
Dynamic, the fish fry being detained in placing tube can be driven out of in rotation process by agitating plate, thus by the fish seedling in placing tube
Plant and banish completely in marine site, it is to avoid a part of fish fry is trapped in placing tube.
Claims (7)
1. a kind of marine fishes releasing ship, is characterized in that, including counterweight, connects axostylus axostyle, is arranged on the vertical guide rod on hull, can
It is slidably arranged in the guide pin bushing on vertical guide rod, the vertical body being arranged on hull and be slidably arranged on and vertical cover internal putting
Put cylinder；
The upper and lower ends opening of described vertical body, and the lower end of vertical body down extends and runs through hull bottom surface, vertically covers
It is tightly connected between body and hull bottom surface, vertical body medial surface top is provided with upper limit block and is located at below upper limit block
Lower limit block；
The upper and lower ends opening of described placing tube, is provided with outer annular limit on placing tube lateral surface, between upper and lower positive stop
Position block, placing tube medial surface bottom is provided with annular limited block；In placing tube, below annular limited block, it is provided with dividing plate,
And this dividing plate can move down along placing tube, and pass through the lower ending opening of placing tube, described dividing plate is provided with and some runs through dividing plate
The inlet through hole of upper and lower surface；
Described connection axostylus axostyle is vertically arranged, and the lower end connecting axostylus axostyle is stretched in placing tube, and is connected with dividing plate；Connect axostylus axostyle
Middle part is splined shaft, and top is polished rod axle, and splined shaft is coaxially disposed with polished rod axle, and described polished rod axle is arranged with connecting shaft
Set, splined shaft is arranged with splined sleeve, and the internal diameter of splined sleeve is more than polished rod axle external diameter, connecting bushing and splined sleeve position
Above placing tube；It is connected by horizontal brace rod between described connecting bushing and guide pin bushing, described polished rod axle is provided with ring
Shape spacing block set and lower annular stop projection, and connecting bushing be located at upper and lower annular stop projection between, lower annular stop projection
Spacing and polished rod axle lower end between is more than the axial length of splined sleeve；Described splined sleeve passes through the first connector and hull
It is connected；
It is provided with the agitating plate parallel with being connected axostylus axostyle, this agitating plate passes through second even with being connected between axostylus axostyle in described placing tube
Fitting is connected；It is provided with driving impeller below described dividing plate, and drives impeller to be fixed on dividing plate, this driving impeller includes some
Around the uniform blade of connection axostylus axostyle circumference；
On described vertical guide rod, below guide pin bushing, it is provided with the compression spring that guide pin bushing can be made up to elapse, vertical guide rod lateral surface
Above, it is located at and be additionally provided with circular orientation block below guide pin bushing, and when guide pin bushing moves down and is resisted against on circular orientation block, described
Connect axostylus axostyle to move down under Gravitative Loads, and make lower annular stop projection be resisted against splined sleeve upper end.
2. a kind of marine fishes releasing ship according to claim 1, is characterized in that, when outer annular limited block is resisted against lower limit
On the block of position, and when lower annular stop projection is resisted against splined sleeve upper end, the upper end of described splined shaft is located under splined sleeve
Side, dividing plate is located at below placing tube, and the spacing between dividing plate and placing tube lower end be more than splined shaft upper end and splined sleeve it
Between spacing.
3. a kind of marine fishes releasing ship according to claim 1, is characterized in that, described horizontal brace rod is provided with extension
Ring, described counterweight is provided with hook；And when counterweight is hung on link by described hook, the gravity of counterweight will overcome pressure
The elastic force of contracting spring, makes guide pin bushing move down and is resisted against on circular orientation block.
4. a kind of marine fishes releasing ship according to claim 1 or 2 or 3, is characterized in that, when outer annular limited block against
When on upper limit block, the lower end of placing tube is located at vertical covering in vivo；When outer annular limited block is resisted against on lower limit block
When, the lower end of placing tube is located at the lower section of vertical body.
5. a kind of marine fishes releasing ship according to claim 1 or 2 or 3, is characterized in that, described blade is in circular arc.
6. a kind of marine fishes releasing ship according to claim 1 or 2 or 3, is characterized in that, the plate face edge of described agitating plate
Connect radially extending of axostylus axostyle.
7. a kind of marine fishes releasing ship according to claim 1 or 2 or 3, is characterized in that, described agitating plate and placing tube
Spacing between inwall is more than the height of projection of annular limited block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510056346.8A CN104686412B (en) | 2015-02-04 | 2015-02-04 | Marine fish release ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510056346.8A CN104686412B (en) | 2015-02-04 | 2015-02-04 | Marine fish release ship |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104686412A CN104686412A (en) | 2015-06-10 |
| CN104686412B true CN104686412B (en) | 2017-01-25 |
Family
ID=53334312
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510056346.8A Active CN104686412B (en) | 2015-02-04 | 2015-02-04 | Marine fish release ship |
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| CN (1) | CN104686412B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108651601A (en) * | 2018-04-02 | 2018-10-16 | 浙江大学舟山海洋研究中心 | A kind of automatic turning liquid nitrogen quick cooler |
| CN109258521B (en) * | 2018-09-20 | 2021-06-22 | 浙江省海洋水产研究所 | Rotary fish releasing device |
| CN109315323B (en) * | 2018-09-20 | 2020-04-07 | 浙江省海洋水产研究所 | Marine ecological remediation is with releasing ship |
| CN110089464B (en) * | 2019-04-11 | 2021-06-22 | 浙江省海洋水产研究所 | Can improve seedling survival rate's trigger formula utensil of releasing |
| CN110089463B (en) * | 2019-04-11 | 2021-06-22 | 浙江省海洋水产研究所 | Hanging pulling type seedling releasing device |
| CN111264425B (en) * | 2019-11-06 | 2021-09-03 | 浙江省海洋水产研究所 | Release ship |
| CN111248124B (en) * | 2019-11-06 | 2021-08-20 | 浙江省海洋水产研究所 | Spiral shell class releasing device |
| CN113734364A (en) * | 2021-10-19 | 2021-12-03 | 浙江海洋大学 | Proliferation and releasing device for sightseeing boat and using method thereof |
| CN114521508B (en) * | 2022-02-25 | 2023-04-07 | 哈尔滨学院 | Lactobacillus is to intestinal mucosa's protective capacities simulation experiment device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201624062U (en) * | 2009-08-24 | 2010-11-10 | 上海海洋大学 | Marine continuous enhancement and release device |
| CN202151077U (en) * | 2011-06-10 | 2012-02-29 | 浙江海洋学院 | Quick fry releasing ship |
| CN102599089A (en) * | 2012-03-23 | 2012-07-25 | 上海海洋大学 | Deck-type discharge device |
| CN202987466U (en) * | 2012-11-15 | 2013-06-12 | 浙江海洋学院 | Cuttlefish population reinforcing releasing boat |
| CN203692193U (en) * | 2014-02-27 | 2014-07-09 | 中国水产科学研究院黑龙江水产研究所 | Large-water releasing device for cold-water fishes |
| JP5715720B2 (en) * | 2014-03-24 | 2015-05-13 | 株式会社むつ家電特機 | Shellfish retrieval method and shellfish retrieval device |
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2015
- 2015-02-04 CN CN201510056346.8A patent/CN104686412B/en active Active
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