CN201451050U - Chinese mitten crab circulated water cultivating device capable of controlling dissolved oxygen - Google Patents
Chinese mitten crab circulated water cultivating device capable of controlling dissolved oxygen Download PDFInfo
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- CN201451050U CN201451050U CN2009200732837U CN200920073283U CN201451050U CN 201451050 U CN201451050 U CN 201451050U CN 2009200732837 U CN2009200732837 U CN 2009200732837U CN 200920073283 U CN200920073283 U CN 200920073283U CN 201451050 U CN201451050 U CN 201451050U
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Abstract
A Chinese mitten crab circulated water cultivating device capable of controlling dissolved oxygen inside comprises a cultivating device, and is characterized by further comprising a water body dissolved oxygen control device, a circulated filter device and a detection device, wherein the water body dissolved oxygen control device, the cultivating device and the circulated filter device are connected through a pipeline, a valve and a water pump, the detection device is arranged on the water body dissolved oxygen control device and the cultivating device for detecting the dissolved oxygen volume of the whole cultivating device. The Chinese mitten crab circulated water cultivating device leads the cultivating body of the Chinese mitten crab to reach the oxygen-free and low-oxygen state through the methods of simultaneously aerating a mixing groove by nitrogen and oxygen through arranging the mixing groove in the water body dissolved oxygen control device, sealing the cultivating groove, the mixing groove and the filter groove, and arranging gas outlets on the filter groove cover, excellently solves the problem of cultivating Chinese mitten crab in indoor low oxygen state, and has simple operation and convenient maintenance.
Description
Technical field
The utility model relates to a kind of aquaculture equipment, and particularly a kind of Juvenile Crab Eriocheir sinensis is cultured circulating system device.
Background technology
River crab belongs to Arthropoda, Crustachia, Decapoda, Grapsidae, Eriocheir claims river crab, eriocheir sinensis, clear water crab, steamed crab or crab etc. again, formal name used at school Eriocheir sinensia (EriocheirS inensis), be the economic crab that China mainly cultures, cultured output in 2007 is up to 47.6 ten thousand tons, nearly 40,000,000,000 yuan of the output value.River crab is the migration shellfish, and the requirement to dissolved oxygen in its whole life process is very high.Principal mode China breed Eriocheir sinensia is pond culture at present, because the restriction of condition, particularly at high temperature season, anoxia phenomenon very easily appears in cultivating pool.But general indoor Eriocheir sinensia cultivator can only reach normally and the breed under the dissolved oxygen level of saturated concentration, can't control the dissolved oxygen of water body, can better not simulate in the open-air cultivating pool the residing dissolved oxygen level of Eriocheir sinensia so that it is studied.
The utility model content
Technical problem to be solved in the utility model is to provide the controlled Juvenile Crab Eriocheir sinensis of a kind of oxyty to culture circulating system device, to solve the difficult problem that indoor hypoxemia Eriocheir sinensia is cultured.
The purpose of the utility model device provides the controlled Juvenile Crab Eriocheir sinensis of a kind of oxyty and cultures circulating system device, its advantage is to control the dissolved oxygen of Juvenile Crab Eriocheir sinensis living environment, keep flowing of living environment water body, and simple to operate, very practical for the breed of Juvenile Crab Eriocheir sinensis under the indoor different oxytys.
Above-mentioned purpose is realized by following technical scheme:
A kind of Eriocheir sinensia circulating water cultivation device of indoor controlled dissolved oxygen, comprise a cultivator, it is characterized in that also comprising water body dissolved oxygen control device and circulation filter and checkout gear, affiliated water body dissolved oxygen control device, cultivator are connected by pipeline, valve, water pump with circulation filter, described checkout gear is arranged on water body dissolved oxygen control device and the cultivator, to detect the dissolved oxygen amount of whole cultivator.
The water body dissolved oxygen control device of the utility model cyclic culture device comprises a mixing channel and oxygenerator, nitrogen making machine, notch at described mixing channel is provided with the mixing channel lid that seals, and the oxygen and the nitrogen of described oxygenerator and nitrogen making machine preparation charge in the mixing channel by nanometer oxygenation pipe and nanometer nitrogen blanketing valve; Described mixing channel is provided with first checkout gear, and the delivery port of described mixing channel connects cultivator by first water pipe and first valve, and water inlet connects circulation filter by second water pipe.The mutual S shape of described nanometer oxygenation pipe and nanometer nitrogen blanketing valve is passed the upper and lower layer system stream dividing plate in the mixing channel.
Described circulation filter comprises tool sealing in a filtration cycle groove and the filtration cycle groove that seals lid and the capping and the venthole that can open, be divided in the described filtration cycle groove and filter compartment and water pump compartment, described filtration compartment is provided with spongy layer and three layer filtration layer, lay water pump and heating rod at described water pump compartment, the current that water inlet is come in by spongy layer flow to filter course and after filtration laminar flow go out, pump in the described mixing channel by second water pipe by water pump again; Water inlet is connected with described cultivator by the 3rd water pipe, the 3rd valve on the filtration cycle groove.
In above-mentioned circulation filter, described filter course is three layers, is divided into first filter course, second filter course and the 3rd filter course according to the trend of water (flow) direction; Wherein first filter course is an active carbon layer, and described second filter course is active layer of sand, and described the 3rd filter course is the glass circular layer.
Described cultivator comprises a breeding trough and is arranged on the breeding trough capping on the breeding trough notch and is installed in second checkout gear on the breeding trough; In the cell body of described breeding trough, be provided with several and culture compartment, be used to separate offer on the dividing plate of culturing compartment porose so that water circulation; This cultivator comprises that also one is affixed on the annular conduit of culturing on the cell wall, evenly offers some apopores on described annular conduit; The import of described annular conduit is communicated with first valve, and the other end of annular conduit is by being opened in the breeding trough as doing the water hole.
Described several are cultured compartment and can be moved up and down in described breeding trough.
Above-mentioned first checkout gear and second checkout gear are dissolved oxygen meter, and the probe of described first dissolved oxygen meter extend in the mixing channel, and the probe of described first dissolved oxygen meter extend in the breeding trough.
It is that Juvenile Crab Eriocheir sinensis is cultured the space that of the present utility model several are cultured compartment, current are flowed out by mixing channel, enter in the breeding trough through first water pipe, first valve, each breed compartment by in the annular conduit inflow breeding trough inserts mixing channel by the 3rd valve, the 3rd water pipe and filtering circulating device and second water pipe again; Dissolved oxygen in the whole water body is by first dissolved oxygen meter and the monitoring of second dissolved oxygen meter.After water body entered filtering circulating device, by the sponge layer, the three layer filtration layer of flowing through was then pumped by water pump after filtering, finishes filtration earlier.The temperature of EGR is finished by the heating rod in the circulation filter.The water body oxyty is controlled in the Eriocheir sinensia circulating water cultivation device.Regulate the pressure and the flow of oxygenerator and nitrogen making machine, make the water body that forms the homogeneous oxyty in the mixing channel, flow into then in the breeding trough, make trough inner water body dissolved oxygen unanimity.Open during this period and be positioned at lautertuns and cover venthole.Native system can be controlled the oxyty of culturing the space more accurately, and simple to operate, economical.
During use, earlier will charge into water in mixing channel, breeding trough and the lautertuns, start the circulatory system, water body flow circuit in the device, after stable, start nitrogen making machine and oxygenerator, open and be positioned at lautertuns and cover venthole, regulate the flow of two machines, oxygen and nitrogen are by nanometer oxygenation pipe and the input of nanometer nitrogen blanketing valve, after the second dissolved oxygen meter stable reading in the breeding box, open the breeding trough capping, young crab is put into the breed compartment of breeding box, and the sealing capping can realize the breed of Eriocheir sinensia under the different oxytys.
Adopt the Eriocheir sinensia water circulation cultivator of the controlled dissolved oxygen of technique scheme, can finish the indoor culture test of the Eriocheir sinensia under different dissolved oxygen levels.Controlled range is big, can realize the experiment indoor culture of the anaerobic (OD=0mg/L), hypoxemia (the normal dissolved oxygen of 0mg/L-) of Eriocheir sinensia, normal dissolved oxygen, high dissolved oxygen.This device control is simple, is convenient to safeguard.Can well finish the hypoxemia test of indoor Eriocheir sinensia cultures.
The utility model designer is culturing for many years to Eriocheir sinensia on the basis of experience, by in cultivator, setting up mixing channel, and the inflation of with nitrogen and oxygen mixing channel being carried out simultaneously, and the way that breeding trough and mixing channel are sealed, make the breeding water body of Eriocheir sinensia reach the state of anaerobic and hypoxemia, well solved the difficult problem that indoor hypoxemia Eriocheir sinensia is cultured, and this device is simple to operate, easy to maintenance.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further details.
Fig. 1 is a structure chart of the present utility model
Fig. 2 A is the vertical view of breeding trough in the utility model.
Fig. 2 B is the end view of breeding trough in the utility model.
Fig. 3 is the vertical view of mixing channel in the utility model.
Fig. 4 is the schematic diagram of filtration cycle groove in the utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Shown in Fig. 1-4, a kind of Eriocheir sinensia circulating water cultivation device of indoor controlled dissolved oxygen comprises breeding trough 2, mixing channel 1, filtration cycle groove 3.Breeding trough 2, mixing channel 1, filtration cycle groove 3 adopt the thick glass of 10mm to make.On the notch of breeding trough 2, mixing channel 1, filtration cycle groove 3, be stamped the breeding trough capping 11, mixing channel lid 10 and the filtration cycle groove lid 20 that seal respectively, and cover tool venthole 24 on 20 at lautertuns.Oxygenerator 4 and nitrogen making machine 5 connect nanometer oxygenation pipe 8 and nanometer inflated with nitrogen pipe 8a respectively, the oxygen and the nitrogen of oxygenerator 4 and nitrogen making machine 5 preparations charge in the mixing channel 1 by nanometer oxygenation pipe 8 and nanometer nitrogen blanketing valve 8a, and nanometer oxygenation pipe 8 and nanometer nitrogen blanketing valve 8a pass the 26 S-shaped mutual distributions of upper and lower layer system stream dividing plate in mixing channel.The probe of first dissolved oxygen meter 6 extend into the delivery port position in the mixing channel 1.The delivery port of mixing channel 1 connects cultivator by first water pipe 13 and first valve 14, and water inlet connects circulation filter by second water pipe 19.Breeding trough capping 11, mixing channel lid 10 and filtration cycle groove cover 20 tool rubber blankets and each cell body formation sealing function.
Be divided in the filtration cycle groove 3 of circulation filter and filter compartment 3b and water pump compartment 3a, filter compartment 3b and be provided with spongy layer 22 and three layer filtration layer, according to the trend of water (flow) direction, the three layer filtration layer is divided into the first filter course 17a, the second filter course 17b and the 3rd filter course 17c; Wherein the first filter course 17a is an active carbon layer, and the second filter course 17b is active layer of sand, and the 3rd filter course 17c is the glass circular layer.Lay water pump 9 and heating rod 21 at water pump compartment 3a, the current of being come in by water inlet flow to filter course 17a, 17b, 17c and process filtering layer 17a, 17b, 17c outflow by spongy layer 22, are pumped in the mixing channel 1 by second water pipe 19 by water pump 9 again; Water inlet on the filtration cycle groove 3 is connected with breeding trough by the 3rd water pipe 16, the 3rd valve 15.
Breeding trough 2 is the glass water tank of a long 2m, wide 0.8m, high 0.3m, and water level is 0.1m in the case, is provided with the breed compartment 12 that several can move up and down in breeding trough 2 in the cell body of breeding trough 2, is the breed space of Eriocheir sinensia.Be used to separate offer on the dividing plate 23 of culturing compartment 12 porose 24 so that water circulation; In breeding trough 2, be provided with one be affixed on its wall annular conduit 18, on annular conduit 18, offer some with culture the apopore 12a that compartment 12 is communicated with; One end of described annular conduit 18 is communicated with first valve 14.The probe of second dissolved oxygen meter 7 extend in the breeding trough 2.
During use, earlier will charge into water in mixing channel 1, breeding trough 2 and the filtering trough 3, open the venthole 25 that is positioned in the water pump compartment 3a capping 20, start EGR, make the interior water body flow circuit of Eriocheir sinensia circulating water cultivation device of whole indoor controlled dissolved oxygen, after stable, start oxygenerator 4 and nitrogen making machine 5, regulate the flow of two machines, after second dissolved oxygen meter, 7 stable reading in the breeding trough 2, open breeding trough capping 11, young crab is put in the breed compartment 12 in the breeding trough 2, sealing breeding trough capping 11 can realize the breed of Eriocheir sinensia under the different oxytys.
Concrete working method is as follows:
1, the preparation of water body in the Eriocheir sinensia circulating water cultivation device of indoor controlled dissolved oxygen. formally putting into before crab cultures, earlier the Eriocheir sinensia circulating water cultivation device of indoor controlled dissolved oxygen is sterilized, be exposed to the sun in the sun, fully to reach Disinfection Effect, inject running water then in the Eriocheir sinensia circulating water cultivation device of indoor controlled dissolved oxygen, specific practice is to add water to about the 10cm of breeding trough 2, open the water pump 9 among the lautertuns water pump compartment 3a, water body is flowed, open breeding trough capping 11 simultaneously, put into oxygenation rod aeration, and heat by air-conditioning temperature-reducing and heat pump, water temperature is controlled at about the 18-24 degree. respectively add the glucose of 2-5 mg/litre and ammonium chloride so that carbon source and nitrogenous source to be provided at water body, for nitrosoation on the filter bed and nitrifying bacteria growth, at this moment, each cultures one of the Eriocheir sinensia of putting in compartment 12 about 2 grams to system operation 3-4 after week, measured nitrite and the ammonia-nitrogen content in the water body in per two days one time, treat that (ammonia nitrogen is less than 1.0 mg/litre for the basicly stable back of 3-4 week water quality, nitrite is less than 0.15 mg/litre) begin to throw something and feed on a small quantity, progressively strengthen feeding volume. after treating the water quality complete stability, nitrous acid almost can not detect, this filtrate that this water treatment system is described is ripe, and biomembrane is completed into. and whole process probably needs about 8 weeks.
2, the regulation and control of water body dissolved oxygen level.
After circulation filter works well, with breeding trough lid 11, mixing channel lid 10 and 20 sealings of lautertuns lid, open the venthole 25 that lautertuns covers, open nitrogen making machine 5 this moment, regulate the nitrogen flow that of nitrogen making machine 5, allow nitrogen inject in the mixing channel 1, observe the dissolved oxygen meter reading in mixing channel 1 and the breeding trough 2, when the both is shown as zero, prove that in the breeding trough 2 be oxygen-free environment, can carry out the culture experiment of Eriocheir sinensia under the anaerobic.After opening the nursing of breeding trough lid, need readjust the appearance oxygen content by aforesaid operations.
After being adjusted to anaerobic, open lautertuns and cover 20 ventholes 25, open oxygenerator 4 then, regulate oxygenerator and go out oxygen flow, observe dissolved oxygen meter reading in two grooves, under different flows, can obtain the breeding environment of different oxytys.After treating that the demonstration of two dissolved oxygen meters is stable, can carry out the breed of Eriocheir sinensia under the hypoxemia.
3, the cartonning of river crab is cultured.Recirculation system is after adjusting under the state of no crab, open breeding trough capping 11, mixing channel lid 10 and filtration cycle groove lid 20, system is run well, at this moment river crab is put into the breed compartment 12 of breeding trough 2, can fully avoid river crab autotomy each other owing to culture the existence of compartment 12, culture simultaneously and have hole 24 between the compartment 12, the free flow of water energy, water injects from annular conduit 18, when guaranteeing that water is from mixing channel 1 inflow breeding trough 2, the dissolved oxygen of different parts in the breeding trough 2 is consistent.River crab adapts to 3 days in cultivator after, close breeding trough capping 11, mixing channel lid 10 and filtration cycle groove lid 20, open the venthole 25 on the filtration cycle groove lid 20, open nitrogen making machine 5 and oxygenerator 4, regulate flow, observe the dissolved oxygen meter scale, reach the requirement oxyty, carry out formal culture experiment.
4, the work of daily management mainly is to write down water temperature, pH every day, the working condition of observation and inspection water pump and EGR each several part, and emphasis will be checked the inflation situation of nitrogen making machine 5 and oxygenerator 4, and the situation of the dissolved oxygen meter reading in two grooves.Every morning 9:00 and residual bait of 17:00 left and right sides sucking-off in afternoon and ight soil, the fresh feed of throwing something and feeding simultaneously.Replenish the moisture that evaporates in right amount every day, with the water level in the maintenance breeding trough and the water yield in the cultivating system.The intrasystem filter cotton of filtration cycle will clean weekly once, and dirt is cleaned.Culture experiment under low-oxygen environment, the situation that observe interior crab between breed at certain time intervals is when finding have crab unusual, answer opening encapsulation lid, touch its health, find when motionless with glass bar, be considered as dead and taking-up immediately, not contaminated to guarantee water quality, carry out record simultaneously.Operation is finished and is closed seal cover immediately, observes the dissolved oxygen meter scale, regulates oxygenerator 4 and nitrogen making machine 5 flows, oxyty is maintained uncap preceding level.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (9)
1. the Eriocheir sinensia circulating water cultivation device of an indoor controlled dissolved oxygen, comprise a cultivator, it is characterized in that also comprising water body dissolved oxygen control device and circulation filter and checkout gear, affiliated water body dissolved oxygen control device, cultivator are connected by pipeline, valve, water pump with circulation filter, described checkout gear is arranged on water body dissolved oxygen control device and the cultivator, to detect the dissolved oxygen amount of whole cultivator.
2. the Eriocheir sinensia circulating water cultivation device of indoor controlled dissolved oxygen as claimed in claim 1, it is characterized in that, described water body dissolved oxygen control device comprises a mixing channel and oxygenerator, nitrogen making machine, notch at described mixing channel is provided with the mixing channel lid that seals, and the oxygen and the nitrogen of described oxygenerator and nitrogen making machine preparation charge in the mixing channel by nanometer oxygenation pipe and nanometer nitrogen blanketing valve; Described mixing channel is provided with first checkout gear, and the delivery port of described mixing channel connects cultivator by first water pipe and first valve, and water inlet connects circulation filter by second water pipe and water pump.
3. the Eriocheir sinensia circulating water cultivation device of indoor controlled dissolved oxygen as claimed in claim 2 is characterized in that, the system stream dividing plate that is positioned at bottom land and groove lid is housed in the described mixing channel.
4. the Eriocheir sinensia circulating water cultivation device of indoor controlled dissolved oxygen as claimed in claim 2, it is characterized in that, the S-shaped upper strata system stream dividing plate that passes in the mixing channel of described nanometer oxygenation pipe, the nanometer nitrogen blanketing valve is S-shaped to pass mixing channel lower floor system stream dividing plate, and the oxygenation of levels nanometer, nitrogen blanketing valve distribute alternately.
5. the Eriocheir sinensia circulating water cultivation device of indoor controlled dissolved oxygen as claimed in claim 2, it is characterized in that, the filtration cycle groove lid that described circulation filter comprises a filtration cycle groove and seals, and cover the air vent of tool one sealing and energy opening at the filtration cycle groove, be divided in the described filtration cycle groove and filter compartment and water pump compartment, described filtration compartment is provided with spongy layer and three layer filtration layer, lay water pump and heating rod at described water pump compartment, the current that water inlet is come in by spongy layer flow to filter course and after filtration laminar flow go out, pump in the described mixing channel by second water pipe by water pump again; Water inlet is connected with described cultivator by the 3rd water pipe, the 3rd valve on the filtration cycle groove.
6. the Eriocheir sinensia circulating water cultivation device of indoor controlled dissolved oxygen as claimed in claim 5 is characterized in that, described filter course is divided into first filter course, second filter course and the 3rd filter course according to the trend of water (flow) direction; Wherein first filter course is an active carbon layer, and described second filter course is active layer of sand, and described the 3rd filter course is the glass circular layer.
7. the Eriocheir sinensia circulating water cultivation device of indoor controlled dissolved oxygen as claimed in claim 5, it is characterized in that described cultivator comprises a breeding trough and is arranged on the breeding trough capping on the breeding trough notch and is installed in second checkout gear on the breeding trough; In the cell body of described breeding trough, be provided with several and culture compartment, be used to separate offer on the dividing plate of culturing compartment porose so that water circulation; This cultivator comprises that also one is affixed on the annular conduit of culturing on the cell wall, evenly has some apopores and links to each other with breeding trough on described annular conduit.
8. the Eriocheir sinensia circulating water cultivation device of indoor controlled dissolved oxygen as claimed in claim 7 is characterized in that, described several are cultured compartment and can be moved up and down in described breeding trough.
9. the Eriocheir sinensia circulating water cultivation device of indoor controlled dissolved oxygen as claimed in claim 7, it is characterized in that, first checkout gear and second checkout gear are dissolved oxygen meter, and the probe of described first dissolved oxygen meter extend in the mixing channel, and the probe of described first dissolved oxygen meter extend in the breeding trough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200732837U CN201451050U (en) | 2009-06-02 | 2009-06-02 | Chinese mitten crab circulated water cultivating device capable of controlling dissolved oxygen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009200732837U CN201451050U (en) | 2009-06-02 | 2009-06-02 | Chinese mitten crab circulated water cultivating device capable of controlling dissolved oxygen |
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| CN201451050U true CN201451050U (en) | 2010-05-12 |
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| CN2009200732837U Expired - Fee Related CN201451050U (en) | 2009-06-02 | 2009-06-02 | Chinese mitten crab circulated water cultivating device capable of controlling dissolved oxygen |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103283677A (en) * | 2013-05-21 | 2013-09-11 | 北京师范大学 | Modularized laboratory animal raising device |
| CN104396857A (en) * | 2014-12-11 | 2015-03-11 | 成都智拓水族用品有限公司 | Cover plate filter device and installation method thereof |
| US9693537B2 (en) | 2011-12-08 | 2017-07-04 | Pentair Water Pool And Spa, Inc. | Aquaculture pump system and method |
| US9693538B2 (en) | 2013-03-14 | 2017-07-04 | Pentair Water Pool And Spa, Inc. | Carbon dioxide control system for aquaculture |
| CN108244009A (en) * | 2018-02-02 | 2018-07-06 | 中国水产科学研究院东海水产研究所 | In-vitro culture method in a kind of Eriocheir sinensis embryo room |
| CN108496878A (en) * | 2018-04-02 | 2018-09-07 | 李为松 | The filtration system in fish pond |
| US10219491B2 (en) | 2013-03-15 | 2019-03-05 | Pentair Water Pool And Spa, Inc. | Dissolved oxygen control system for aquaculture |
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2009
- 2009-06-02 CN CN2009200732837U patent/CN201451050U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9693537B2 (en) | 2011-12-08 | 2017-07-04 | Pentair Water Pool And Spa, Inc. | Aquaculture pump system and method |
| US9693538B2 (en) | 2013-03-14 | 2017-07-04 | Pentair Water Pool And Spa, Inc. | Carbon dioxide control system for aquaculture |
| US10219491B2 (en) | 2013-03-15 | 2019-03-05 | Pentair Water Pool And Spa, Inc. | Dissolved oxygen control system for aquaculture |
| CN103283677A (en) * | 2013-05-21 | 2013-09-11 | 北京师范大学 | Modularized laboratory animal raising device |
| CN103283677B (en) * | 2013-05-21 | 2014-11-05 | 北京师范大学 | Modularized laboratory animal raising device |
| CN104396857A (en) * | 2014-12-11 | 2015-03-11 | 成都智拓水族用品有限公司 | Cover plate filter device and installation method thereof |
| CN108244009A (en) * | 2018-02-02 | 2018-07-06 | 中国水产科学研究院东海水产研究所 | In-vitro culture method in a kind of Eriocheir sinensis embryo room |
| CN108496878A (en) * | 2018-04-02 | 2018-09-07 | 李为松 | The filtration system in fish pond |
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Granted publication date: 20100512 Termination date: 20130602 |