CN102257976B - Clam seedling catching device - Google Patents
Clam seedling catching device Download PDFInfo
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- CN102257976B CN102257976B CN201110159138A CN201110159138A CN102257976B CN 102257976 B CN102257976 B CN 102257976B CN 201110159138 A CN201110159138 A CN 201110159138A CN 201110159138 A CN201110159138 A CN 201110159138A CN 102257976 B CN102257976 B CN 102257976B
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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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Abstract
The invention relates to a catching device for aquatic products, in particular to a clam seedling catching device. In the clam seedling catching device, a water outlet pipe of a rotary water separator (2) is connected with a water inlet pipe of a water pump (1); a water outlet pipe of the water pump (1) is connected with a main water inlet pipe of a flow ejector (4); a water outlet pipe of the flow ejector (4) is connected to a clam seedling sorting unit (5); a sucker opening of a clam seedling suction head (6) is adsorbed to a clam seedling gravel surface at water bottom downwards; a suction opening of the clam seedling suction head (6) is connected with a water inlet pipe of the rotary water separator (2); a collection opening at the bottom of the rotary water separator (2) is connected to a negative pressure water inlet of the flow ejector (4) by a check valve (3); the check valve (3) is controlled by the negative pressure of the flow ejector (4); and if the suction negative pressure of the flow ejector (4) is more than a set pressure value of the water pump (1), the check valve (3) is opened, and otherwise, the check valve (3) is closed to cut off a channel. In the clam seedling catching device, due to the zero-lift arrangement of the water pump, energy consumption is reduced by over 3 times, clam seedlings can be caught efficiently and quickly in batch, the problem that the clam seedling suction head (6) is blocked by barriers can be solved automatically, the clam seedlings are not damaged, and the subsequent aquaculture survival rate is improved.
Description
Technical field
The present invention is a kind of device of fishing for of aquatic products, particularly relates to a kind of device of fishing for a species of small clam living in fresh water seedling in the water.
Background technology
A species of small clam living in fresh water meat is cold in nature, and it is sweet, salty, nutritious to distinguish the flavor of, and has very high drug value.Mineral matters such as a species of small clam living in fresh water meat rich in proteins, fat and calcium, iron, phosphorus.The clearing heat and promoting diuresis detoxifcation is suitable edible in autumn in summer in the big hot season.Especially it is preferably edible to suffer from disorders such as order Huang, damp beriberi, treatment sore carbuncle be swollen.A species of small clam living in fresh water meat can increase and enrich people's diet kind and dietary structure, has very high edible and medical value.
The breeding way of a species of small clam living in fresh water meat is in certain season, from river sea, fishes for a species of small clam living in fresh water seedling, and then puts into special-purpose lake or pond and raise, reach just can fish for after certain maturity, edible.
A species of small clam living in fresh water seedling is a kind of housing that has, and like the aquatic products of sunflower seed shape, size, a species of small clam living in fresh water seedling is grown in the bottom especially; Mix with the bottom surface sand bed, therefore, desire is fished for a species of small clam living in fresh water seedling; Separate with silt particle; Have and fish for velocity efficiency more greatly, also need not damage a species of small clam living in fresh water seedling, a kind of suitable instrument of fishing for and device must be provided.To fish for be main with manual work all to a species of small clam living in fresh water seedling in the past, adopts the trawlnet pockets to connect mud band sand at several meters dark bottoms and pull simultaneously and leave through washing in a pan screening, and labour intensity is big, yields poorly; Because seedling was main on the south the north was cultured all, during season on the water surface thousands of people fish for a species of small clam living in fresh water seedling simultaneously, but supply falls short of demand.Some uses some slush pumps, sand suction pump aspirates and strengthens the speed of fishing for and amount of fishing, yet a species of small clam living in fresh water seedling can't become alive behind pump leaf bump.Used the jet pump that produce in Taiwan afterwards, and improved fishery output, but make cost too high, power render a service be water pump 1/3rd less than, popularization is obstructed.In this field, it is a kind of efficient, quick that urgent need can provide, and fishes for a species of small clam living in fresh water seedling in enormous quantities, to the little implement device of the active damage of a species of small clam living in fresh water seedling.
Summary of the invention
The present invention intends the device of fishing for that a kind of a species of small clam living in fresh water seedling is provided, and reaching can be efficient, quick, fishes for a species of small clam living in fresh water seedling in enormous quantities, and fishes for separation process to the little purpose of the active damage of a species of small clam living in fresh water seedling.
A kind of a species of small clam living in fresh water seedling is fished for device, it is characterized in that:
Said a species of small clam living in fresh water seedling fishes for that device comprises water pump, revolves separator, check valve, ejector, a species of small clam living in fresh water seedling separation unit and a species of small clam living in fresh water seedling suction nozzle;
The outlet pipe that revolves separator links to each other with the water inlet pipe of water pump;
The outlet pipe of water pump links to each other with the main water inlet tube of ejector;
The outlet pipe of ejector and a species of small clam living in fresh water seedling separation unit are arranged in the water;
The sucker mouth of a species of small clam living in fresh water seedling suction nozzle is downward, is adsorbed on water-bed a species of small clam living in fresh water seedling sandstone face;
The suction outlet of a species of small clam living in fresh water seedling suction nozzle links to each other with the water inlet pipe that revolves the separator sidewall;
Revolve the mouth that gathers of separator bottom, be connected to the negative pressure water inlet of ejector through check valve;
Check valve is controlled by the ejector negative pressure; The negative pressure that is connected side with ejector when check valve during greater than water pump suction inlet pressure set points check valve open; Mouthful negative pressure water inlet to ejector that gathers that allows to revolve the separator bottom flows; The negative pressure that is connected side with ejector when check valve closed check valve during less than water pump suction inlet pressure setup pressure value, cut off revolve the separator bottom gather mouthful and the negative pressure water inlet of ejector between path.
Further; Said a species of small clam living in fresh water seedling separation unit is arranged under water, utilizes a species of small clam living in fresh water seedling, the sandstone mixture of the pipe outlet outflow of ejector in water, to carry out the sedimentation sorting, is poured the net that is arranged on the back after the sorting of a species of small clam living in fresh water seedling; The string bag is to have the circle of rigidity or the framework inlet of rectangle, and the rear portion is a screen pack.
Further, said ejector outlet pipe is arranged in the water, is positioned on the horizontal plane in same waters with a species of small clam living in fresh water seedling suction nozzle.
Further, the foundation of setting the pressure set points of said check valve is:
Before the sucker mouth of a species of small clam living in fresh water seedling suction nozzle, stopped up, revolve separator water inlet pipe inflow and reduce, also the reducing of corresponding water pump into and out of the water yield; The main inlet pipe water yield of ejector reduces; The negative pressure of the nearly ejector side of check valve diminishes, when diminishing setup pressure value to water pump suction inlet pressure, and closed check valve;
Water pump remains in operation, a species of small clam living in fresh water seedling suction nozzle sucker mouth blocking barrier through a species of small clam living in fresh water seedling suction nozzle fish for move in disengaging, open the barrier on a species of small clam living in fresh water seedling suction nozzle sucker mouth voluntarily; Flow rate of water flow in the system speeds, and the main water inlet tube flow velocity of ejector strengthens, and the water inlet negative pressure of ejector increases; Negative pressure in the nearly ejector one side formation of check valve; When pressure became greatly to the setup pressure value of water pump suction inlet pressure, check valve was opened again, recovers normally suction, mask work state.
Adopt the present technique scheme, the sucker mouth of a species of small clam living in fresh water seedling suction nozzle is downward, be adsorbed on water-bed a species of small clam living in fresh water seedling sandstone face; Open water pump, silt particle and a species of small clam living in fresh water seedling are inhaled into together and revolve separator, through influence centrifugal and gravity; Sandstone, a species of small clam living in fresh water seedling are separated, and send into inlet the place ahead of a species of small clam living in fresh water seedling separation unit string bag under water by the ejector effect, through different settling velocity; Sand grains sinks in advance, and a species of small clam living in fresh water seedling flows in the string bag of a species of small clam living in fresh water seedling sorting network interface under the impulse force inertia of water together.
Before the sucker mouth that a species of small clam living in fresh water seedling suction nozzle occurs, stopped up,, in a species of small clam living in fresh water seedling suction nozzle is fished for, can be solved this FAQs natural, easily by the closed check valve in this device.
Advantage of the present invention and beneficial effect, 1. adopting water pump is power, realization is efficient, quick, fishes for the purpose and the effect of a species of small clam living in fresh water seedling in enormous quantities; 2. when the sucker mouth of a species of small clam living in fresh water seedling suction nozzle is blocked; It can cut off the path of check valve, circulation in preventing flow backwards to do, sucker fish for move in the cleaning barrier that is obstructed voluntarily; Remain the suction of sucker mouth, can after breaking through obstruction, fast voluntarily quick-recovery normal operation mode fish for.3. adopt to revolve to divide under water separation device and the external water and wash, do not have direct mechanical movement part and a species of small clam living in fresh water seedling bump, can not damage a species of small clam living in fresh water seedling, the breed survival rate that favourable raising is follow-up.4. above these advantages all are that domestic and international this area did not occur, and have filled up the blank of this area, have very big application value.
Description of drawings
Fig. 1 is the total configuration structure sketch map of a kind of embodiment that a species of small clam living in fresh water seedling of the present invention is fished for device.
Among the figure, the 1st, water pump, the 2nd revolves separator, the 3rd, check valve, the 4th, ejector, the 5th, a species of small clam living in fresh water seedling separation unit, the 6th, a species of small clam living in fresh water seedling suction nozzle.
Embodiment
Below in conjunction with accompanying drawing further explain structure of the present invention.
A kind of a species of small clam living in fresh water seedling is fished for device, comprises water pump 1, revolves separator 2, ejector 4, check valve 3, a species of small clam living in fresh water seedling separation unit 5 and a species of small clam living in fresh water seedling suction nozzle 6;
The outlet pipe that revolves separator 2 links to each other with the water inlet pipe of water pump 1;
The outlet pipe of water pump 1 links to each other with the main water inlet tube of ejector 4;
The outlet pipe of ejector 4 and a species of small clam living in fresh water seedling separation unit 5 are arranged in the water;
Discharge outlet is arranged under water to energy-conservation effect:
The sucker mouth of a species of small clam living in fresh water seedling suction nozzle 6 is downward, is adsorbed on water-bed a species of small clam living in fresh water seedling sandstone face;
The suction outlet of a species of small clam living in fresh water seedling suction nozzle 6 links to each other with the water inlet pipe that revolves separator 2 sidewalls;
Revolve the mouth that gathers of separator 2 bottoms, be connected to the negative pressure water inlet of ejector 4 through check valve 3;
Check valve 3 is controlled by ejector 4 negative pressure; The negative pressure that is connected side with ejector 4 when check valve 3 during greater than water pump 1 suction inlet pressure set points check valve 3 open; Mouthful negative pressure water inlet to ejector 4 that gathers that allows to revolve separator 2 bottoms flows; The negative pressure that is connected side with ejector 4 when check valve 3 during less than water pump 1 setup pressure value check valve 3 close, cut off revolve separator 2 bottoms gather mouthful and the negative pressure water inlet of ejector 4 between path.
Adopt the present technique scheme, the sucker mouth of a species of small clam living in fresh water seedling suction nozzle 6 is downward, be adsorbed on water-bed a species of small clam living in fresh water seedling sandstone face; Open water pump 1, silt particle and a species of small clam living in fresh water seedling are inhaled into together and revolve separator 2, through influence centrifugal and gravity; Sandstone, a species of small clam living in fresh water seedling are separated; Fine sand, mud and water are sucked from revolving separator 2 outlet by water pump 1 suction inlet, send ejector 4 main water inlet tubes, sandstone, the sedimentation of a species of small clam living in fresh water seedling and revolve the mouth that gathers of separator 2 bottoms.
The main water inlet tube of ejector 4 is at the current that receive the flow pressure that water pump 1 sets, and ejector 4 suction inlets produce negative pressure, makes to revolve separator 2 bottoms and gather a species of small clam living in fresh water seedling, the sandstone that mouth gathers and flow to ejector 4 suction inlets simultaneously; Be sent under water inlet the place ahead of the string bag by ejector 4 and carry out the sorting of a species of small clam living in fresh water seedling.
A species of small clam living in fresh water seedling separation unit 5 is arranged under water; Because a species of small clam living in fresh water seedling is different with the settling velocity of sandstone in water; A species of small clam living in fresh water seedling and sandstone are discharged in pipeline, and sandstone sinks in advance, and a species of small clam living in fresh water seedling is flow in a species of small clam living in fresh water seedling sorting string bag by the impulse force inertia of water together; The string bag has the circle of rigidity or the framework inlet of rectangle, and the rear portion is the filtration gauze less than a species of small clam living in fresh water seedling aperture.Through string bag filter screen elimination impurity and unqualified a species of small clam living in fresh water seedling, obtain a species of small clam living in fresh water seedling of clean neat key health at last.
Discharge outlet is arranged under water to energy-conservation effect: know that water pump 1 outlet is communicated in ejector 4 delivery ports, import is communicated in a species of small clam living in fresh water seedling suction nozzle 6 the sixth of the twelve Earthly Branches, two ends pressure reduction equates on the same water surface, and water pump Yang Cheng equals zero; For prevent a species of small clam living in fresh water seedling in suction excessive negative pressure to the damage of a species of small clam living in fresh water seedling; This ejector 4 adopts the low voltage control current; Because ejector 4 only makes to revolve the usefulness of a species of small clam living in fresh water seedling sucking-off that separator 2 gathers, so ejector 4 working pressures are as long as satisfy greater than water pump 1 suction inlet pressure set points; Suction inlet pressure set points T: a species of small clam living in fresh water seedling suction permissible velocity 4-8 meter per second, T=-V/2g=8/2*9.81=3.26Pa (not comprising other factorses such as the resistance of ducting) sees that discharge outlet is arranged at the effect that reduces pressure under water from calculate.Contrast is at present partly also inhaled seedling at the jet that uses and fished for device: by jet characteristics, the jet water absorption is 1/3 of a water pump, and a species of small clam living in fresh water seedling water pump Yang Cheng of being sorted on the water surface to be produced has greater loss to power again.Both contrasts: adopt that water pump is inhaled, only to be used in power that a species of small clam living in fresh water seedling in a small amount discharges be that the ratio of the ejector power of directly inhaling seedling is more than 1/3 to ejector, so that this a species of small clam living in fresh water seedling is fished for device is energy-conservation obviously.
In the process of fishing for; When the sucker mouth with a species of small clam living in fresh water seedling suction nozzle 6 was stopped up by water-bed barrier, the water yield of water pump 1 descended, ejector 4 trunk line lacks of water; Jet suction inlet negative pressure descends; And water pump 1 suction inlet negative pressure is directed at and revolves separator 2 bottom a species of small clam living in fresh water seedlings and discharge and anti-stream occurs and pour in down a chimney, and at this moment check valve receives refluence pressure and in time closes voluntarily to cut off and pour in down a chimney current, prevent to flow backwards take place in circulation and the effect of losing the job.
Because check valve 3 has been closed, this moment, water pump 1 remained in operation: it is the mode of drawing a species of small clam living in fresh water seedling in the water-bed surperficial sand bed in moving through a species of small clam living in fresh water seedling suction nozzle 6 that a species of small clam living in fresh water seedling is fished for, and moves through a species of small clam living in fresh water seedling suction nozzle 6 simultaneously and opens the barrier that stops up on the suction nozzle 6 sucker mouths automatically; Once stop up open after, the current in the apparatus system are got back to operate as normal, the suction inlet negative pressure of ejector 4 forms and during greater than water pump 1 suction inlet pressure set points, check valve 3 is opened again, returns to again that original normal condition is aspirated, mask work.
The configuration fence is greater than the filtration fence of a species of small clam living in fresh water seedling profile before the sucker mouth of said a species of small clam living in fresh water seedling suction nozzle 6.Can stop the foreign material that a part of profile is excessive, alleviate the follow-up live load of whole device.
The foundation of the pressure set points of said check valve 3 is:
Before the sucker mouth of a species of small clam living in fresh water seedling suction nozzle 6, stopped up; Revolving separator 2 water inlet pipe inflows reduces; Correspondingly revolve also reducing into and out of the water yield of separator 2 outlet pipes, water pump 1, the negative pressure water inlet water yield of ejector 4 reduces, and the pressure of check valve 3 nearly ejector 4 sides diminishes; Diminish to water pump 1 swabbing pressure setting value, check valve 3 is closed; Water pump 1 remains in operation; A species of small clam living in fresh water seedling suction nozzle 6 will be opened the obstruction on a species of small clam living in fresh water seedling suction nozzle 6 sucker mouths voluntarily in moving, the flow rate of water flow in the system speeds, and the main water inlet tube flow velocity of ejector 4 strengthens; The water sucking mouth negative pressure of ejector 4 increases; Greater than water pump 1 swabbing pressure setting value leaf, check valve 3 is opened again in the negative pressure of check valve 3 nearly ejector 4 one sides, recovers normally suction, mask work state.According to above relation, can confirm each machine, the pressure set points that controlling non-return valve 3 is closed in the various operating environments.Certainly, when the pressure that receives when check valve 3 is greater than or less than water pump 1 swabbing pressure setting value, can predesignate to opening or close a kind of state in the check valve 3.
As embodiment; A species of small clam living in fresh water seedling of the present invention is fished for device a species of small clam living in fresh water seedling suction nozzle 6 is put into the bottom; A species of small clam living in fresh water seedling suction nozzle is equipped with fence for 6 mouthfuls, can intercept big mudstone foreign material, by 10--30 kilowatt of water pump 1 a species of small clam living in fresh water seedling is sucked with some silts and revolves separator 2; Flow to ejector 4 through check valve 3, by ejector 4 a species of small clam living in fresh water seedling, silt are rushed at and carry out sorting in the water; Enter a species of small clam living in fresh water seedling in the water, the impulse force inertia that sandstone form by solid carbon dioxide pump 1 pressure, according to the certainly sorting of a species of small clam living in fresh water seedling that is situated between of a species of small clam living in fresh water seedling, sandstone different settling velocity in water; The string bag of a species of small clam living in fresh water seedling separation unit 5 is positioned over a species of small clam living in fresh water seedling settling zone behind the jet pipe, and it is fixed that the impulse force inertia that distance forms according to water pump 1 pressure comes; String bag mouth is circle or rectangle entrance framework, and screen distance is less than a species of small clam living in fresh water seedling a species of small clam living in fresh water lattice, the screen cloth that sieves greater than husky mud impurity.
Claims (4)
1. a species of small clam living in fresh water seedling is fished for device, it is characterized in that:
Said a species of small clam living in fresh water seedling fishes for that device comprises water pump (1), revolves separator (2), check valve (3), ejector (4), a species of small clam living in fresh water seedling separation unit (5) and a species of small clam living in fresh water seedling suction nozzle (6);
The outlet pipe that revolves separator (2) links to each other with the water inlet pipe of water pump (1);
The outlet pipe of water pump (1) links to each other with the main water inlet tube of ejector (4);
The outlet pipe of ejector (4) and a species of small clam living in fresh water seedling separation unit (5) are arranged in the water;
The sucker mouth of a species of small clam living in fresh water seedling suction nozzle (6) is downward, is adsorbed on water-bed a species of small clam living in fresh water seedling sandstone face;
The suction outlet of a species of small clam living in fresh water seedling suction nozzle (6) links to each other with the water inlet pipe that revolves separator (2) sidewall;
Revolve the mouth that gathers of separator (2) bottom, be connected to the negative pressure water inlet of ejector (4) through check valve (3);
Check valve (3) receives the control of ejector (4) negative pressure; The negative pressure that is connected side with ejector (4) when check valve (3) during greater than water pump (1) suction inlet pressure set points check valve (3) open; Allowing to revolve separator (2) bottom gathers a species of small clam living in fresh water seedling, the sandstone that mouth gathers and flows to the negative pressure water inlet of ejector (4); The negative pressure that is connected side with ejector (4) when check valve (3) during less than water pump (1) suction inlet pressure setup pressure value check valve (3) close, cut off revolve separator (2) bottom gather mouthful and the negative pressure water inlet of ejector (4) between path.
2. fish for device according to the said a species of small clam living in fresh water seedling of claim 1, it is characterized in that:
Said a species of small clam living in fresh water seedling separation unit (5) is arranged under water; Utilize a species of small clam living in fresh water seedling, the sandstone mixture of the pipe outlet outflow of ejector (4) in water, to carry out the sedimentation sorting; Poured the net that is arranged on the back after the sorting of a species of small clam living in fresh water seedling, the string bag is to have the circle of rigidity or the framework inlet of rectangle, and the rear portion is a screen pack.
3. fish for device according to the said a species of small clam living in fresh water seedling of claim 1, it is characterized in that said ejector (4) outlet pipe is arranged in the water, is positioned on the horizontal plane in same waters with a species of small clam living in fresh water seedling suction nozzle (6).
4. fish for device according to the said a species of small clam living in fresh water seedling of claim 1, the foundation that it is characterized in that setting the pressure set points of said check valve (3) is:
Before the sucker mouth of a species of small clam living in fresh water seedling suction nozzle (6), stopped up; Revolving separator (2) water inlet pipe inflow reduces; Also reducing of corresponding water pump (1) into and out of the water yield, the main inlet pipe water yield of ejector (4) reduces, and the negative pressure of nearly ejector (4) side of check valve (3) diminishes; When diminishing setup pressure value to water pump (1) suction inlet pressure, check valve (3) is closed;
Water pump (1) remains in operation; A species of small clam living in fresh water seedling suction nozzle (6) sucker mouth blocking barrier through a species of small clam living in fresh water seedling suction nozzle (6) fish for move in disengaging, open the barrier on a species of small clam living in fresh water seedling suction nozzle (6) sucker mouth voluntarily, the flow rate of water flow in the system speeds; The main water inlet tube flow velocity of ejector (4) strengthens; The water inlet negative pressure of ejector (4) increases, in the negative pressure that nearly ejector (4) one sides of check valve (3) form, when pressure becomes greatly to the setup pressure value of water pump (1) suction inlet pressure; Check valve (3) is opened again, recovers normally suction, mask work state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110159138A CN102257976B (en) | 2011-06-14 | 2011-06-14 | Clam seedling catching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110159138A CN102257976B (en) | 2011-06-14 | 2011-06-14 | Clam seedling catching device |
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| Publication Number | Publication Date |
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| CN102257976A CN102257976A (en) | 2011-11-30 |
| CN102257976B true CN102257976B (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110159138A Expired - Fee Related CN102257976B (en) | 2011-06-14 | 2011-06-14 | Clam seedling catching device |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102578057B (en) * | 2012-03-05 | 2013-12-04 | 福州百特节能科技有限公司 | Shellfish product harvester |
| CN107087573B (en) * | 2017-05-31 | 2022-05-17 | 福建农林大学 | Turning intertidal zone razor clam collecting vehicle and working method thereof |
| CN107223641B (en) * | 2017-05-31 | 2022-07-12 | 福建农林大学 | Shallow sea intertidal razor clam collecting vehicle and working method thereof |
| CN109527059B (en) * | 2019-01-23 | 2023-06-30 | 刘永阁 | Batch clam separating and cleaning device and method |
| CN109699538B (en) * | 2019-03-11 | 2021-04-27 | 南宁市武鸣金三川农业科技有限公司 | Leech culture dredging and leech capturing device |
| CN114837287B (en) * | 2022-03-30 | 2023-04-07 | 中徽生态环境有限公司 | Bury formula sewage treatment plant suitable for rural single household type human settlements |
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| CN2887057Y (en) * | 2006-05-11 | 2007-04-11 | 重庆大学 | A jet-flow type oxygen supplying machine |
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| CN201440880U (en) * | 2009-06-15 | 2010-04-28 | 张吉全 | Automatic shellfish fishing device |
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| JP4963295B2 (en) * | 2008-02-28 | 2012-06-27 | 長崎県 | Bivalve floating larva rearing method and rearing apparatus |
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|---|---|---|---|---|
| CN2887057Y (en) * | 2006-05-11 | 2007-04-11 | 重庆大学 | A jet-flow type oxygen supplying machine |
| CN201274710Y (en) * | 2008-09-25 | 2009-07-22 | 张景寿 | Full automatic field snail-sucking boat with vacuum device |
| CN201440880U (en) * | 2009-06-15 | 2010-04-28 | 张吉全 | Automatic shellfish fishing device |
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