JPS62186729A - Method for discharging residual bast of fish breeding basin - Google Patents
Method for discharging residual bast of fish breeding basinInfo
- Publication number
- JPS62186729A JPS62186729A JP2602086A JP2602086A JPS62186729A JP S62186729 A JPS62186729 A JP S62186729A JP 2602086 A JP2602086 A JP 2602086A JP 2602086 A JP2602086 A JP 2602086A JP S62186729 A JPS62186729 A JP S62186729A
- Authority
- JP
- Japan
- Prior art keywords
- water
- slit
- wall surface
- suction nozzle
- strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 241000251468 Actinopterygii Species 0.000 title claims description 19
- 238000000034 method Methods 0.000 title claims description 9
- 238000007599 discharging Methods 0.000 title claims description 6
- 238000009395 breeding Methods 0.000 title 1
- 230000001488 breeding effect Effects 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 239000013049 sediment Substances 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 18
- 230000000694 effects Effects 0.000 claims description 17
- 230000001154 acute effect Effects 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 4
- 210000003608 fece Anatomy 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 235000013305 food Nutrition 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000009372 pisciculture Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Farming Of Fish And Shellfish (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
発明の一部１
産業１−の利用法μ
この発明は、養魚場において水底に沈降した食べ残しの
−１や魚の排伊物を養魚場外に排出する方法に関するも
のである。[Detailed Description of the Invention] Part 1 of the Invention Industry 1 - Usage μ This invention relates to a method for discharging uneaten food and fish excreta that have settled to the bottom of the water at a fish farm out of the fish farm. be.
従来の技術
近年、魚の養殖技術が発展し、はまちなどの高級魚の養
殖が実用化されているが、養魚場において１ｊえた河の
うち３０％は食べ残されて水底に沈降する。さらに、魚
に食べられた７０％のかｒのうち魚肉となるのは１０％
で、６０％は排泄されるため、結局失えた餌の９０％は
食べ残し又は糞となって水底付近に沈降し、時間の経過
と共に増加して行く。Conventional Technology In recent years, fish farming technology has developed and farming of high-grade fish such as hamachi has become practical, but 30% of the fish harvested at fish farms remains uneaten and settles to the bottom of the water. Furthermore, of the 70% of the curd eaten by fish, only 10% becomes fish meat.
Since 60% of the food is excreted, 90% of the lost food becomes uneaten food or feces and settles to the bottom of the water, increasing in number over time.
このような沈降物は有機質で、リンや窒素も含むため、
水質が富栄養化され、赤潮の発生原因となる。赤潮が異
常発生すれば海水は酸欠状態となり、多着の魚介類を死
滅させ、多くの損害をもたらす。This sediment is organic and contains phosphorus and nitrogen, so
Water quality becomes eutrophic, causing red tide. When red tide occurs abnormally, the seawater becomes oxygen-deficient, killing a large number of fish and shellfish, and causing a lot of damage.
従って養魚場の残餌を排出することは養魚場の管理上重
要な問題であるが、吸込ポンプはｌＯｍ以−ヒの深さに
は適用不ｎ（能であり、また機械的なドレッジング等の
Ｌ段を使用すると、沈降物層がかき乱されて一部が拡散
したり、水底のト砂や無機質の堆積層の原状が損なわれ
たりして、魚類の生態的環境に悪影響を与えることにな
るため、従来は放置されていた。Therefore, draining the remaining feed from fish farms is an important issue in fish farm management, but suction pumps are not applicable to depths of 10m or more, and mechanical dredging etc. If the L stage is used, the sediment layer will be disturbed and some of it will be dispersed, and the original state of the sand and mineral sediments on the bottom of the water will be damaged, which will have a negative impact on the ecological environment of fish. Therefore, it was previously abandoned.
発明が解決しようとする問題点
本発明は、水底の土砂や無機質の堆積層の原状を損なう
ことなく、残Ｎ２等の沈降物を排出する方法を提供する
ことを目的とする。Problems to be Solved by the Invention It is an object of the present invention to provide a method for discharging sediments such as residual N2 without damaging the original condition of the sediment and mineral deposits at the bottom of the water.
発明のＪＩ′Ｌ或
問題点を解決するためのＬ段
本発明の養魚場の残ｆＪＴ排出方法は、水底付近の沈降
物を、コアンダ効果を利用する吸引ノズルを用いて水底
付近に生起させた水流と）（に吸引し、管路により移送
することよりなる。JI'L of the invention L-stage for solving certain problems The method for discharging residual fJT from a fish farm of the present invention generates sediment near the water bottom using a suction nozzle that utilizes the Coanda effect. It consists of suctioning water into (a stream of water) and transporting it through a pipe.
これを第１図により説明すると、水底１付近シこ懸濁乃
至堆積している食べ残しの河や糞よりなる沈降物２を、
例えば作業船３からローブ４で懸６したコアンダ効果を
利用する吸引ノズル１０を用いて水底付近に生起させた
水ｆＩｔ５と共に吸引し。To explain this with reference to Figure 1, sediment 2 consisting of uneaten rivers and feces suspended or deposited near the water bottom 1,
For example, by using a suction nozzle 10 that utilizes the Coanda effect suspended by a lobe 4 from the work boat 3, it is sucked together with water fIt5 generated near the bottom of the water.
管路６により移送する。吸引ノズル１０はバイブ７から
加圧流体（圧縮空気又は高圧水）を供給することにより
作動させる。It is transferred by pipe line 6. The suction nozzle 10 is operated by supplying pressurized fluid (compressed air or high pressure water) from the vibrator 7.
コアンダ効果を利用する吸引ノズル１０は、第１図に示
す如く開口部１５（第３〜５図参照）を水モ方向に向け
た状態で水乎方向の水流を生起させてもよいし、第２図
（管路及びパイプの記載を省略）に示す如く開［１部１
５を下方に向けた状態：で上昇方向の水流を生起させて
もよい。前者の場合は沈降物層に近づけた状態、後者の
場合は沈降物層からやや離した状態で使用するのがよい
、水底の地質、岩石の存在の有無、沈降物層の厚さ等に
応じて適当な方法を選択することができる。The suction nozzle 10 using the Coanda effect may generate a water flow in the water direction with the opening 15 (see FIGS. 3 to 5) facing the water direction as shown in FIG. As shown in Figure 2 (the description of conduits and pipes are omitted),
A water flow in an upward direction may be generated in the state in which 5 is facing downward. In the former case, it is best to use it close to the sediment layer, and in the latter case, it is best to use it slightly away from the sediment layer, depending on the geology of the water bottom, the presence or absence of rocks, the thickness of the sediment layer, etc. You can choose an appropriate method.
コアンダ効果を利用する吸引ノズルを用いて水底付近に
水流を生起させると、水底付近の沈降物は水流と共に吸
引され、そのまま接続管路により移送される。この作用
により吸引ノズル付近の沈降物は拡散することなくスム
ーズに排出される。When a water flow is generated near the bottom of the water using a suction nozzle that utilizes the Coanda effect, sediment near the bottom of the water is sucked together with the water flow and transported as it is through the connecting pipe. Due to this action, sediment near the suction nozzle is smoothly discharged without spreading.
水底の起伏が激しい場所などでは、水面から水底までの
深さを検出し、コアンダ効果を利用する吸引ノズルと水
底との間の距離を一定に制御することにより、沈降物を
万一なく排出することができる。In places where the bottom of the water is highly undulating, the depth from the water surface to the bottom is detected and the distance between the suction nozzle, which utilizes the Coanda effect, and the bottom of the water is controlled to a constant level to ensure that sediment is discharged without any problems. be able to.
コアンダ効果（Ｃ：ｏａｎｄａ ｅｆｆｅｃｔ）とは、
自由空間におけるガスや液などの流体の流れが壁面に接
触した場合、その壁面に添って流れる現象を言い、最近
では短距ｇｌ＃着陸機「飛、”ＩＪの開発に応用されて
話題を提供しているが、農水産関係に応用された°１９
例はない。What is the Coanda effect (C)?
This is a phenomenon in which a fluid such as gas or liquid in free space flows along the wall when it comes into contact with that wall.Recently, it has been applied to the development of the short-range GL# lander "Hi" IJ and has become a hot topic. 19 applied to agriculture and fisheries.
There are no examples.
コアンダ効果を利用する吸引ノズルの構造は、周囲が壁
で囲まれ入１１端と出目端とを有する筒体における壁面
の少なくとも一部に、入口端の中心と出［−１端の中心
とを結ぶ線に対して直角方向に帯状の細隙が設けられ、
その帯状の細隙を構成している一方の側壁は滑らかに湾
曲して細隙が存在する壁面の出口端側の壁面に移行し、
帯状の細隙を構成している他方の側壁は対向する側壁が
滑らかに湾曲し始める位置又はそれより手前で直角又は
鋭角的に折れ曲って細隙が存在する壁面の入［１端側の
壁面に移行している形状を有し、前記筒体の入［１端は
外部環境に開口し、出口端は管路に接続するように形成
されていると共に、面記帯状の１細隙の外側から流体を
圧入する一Ｌ段を備えているものである。The structure of a suction nozzle that utilizes the Coanda effect is such that at least part of the wall surface of a cylinder is surrounded by a wall and has an inlet end and an outlet end. A band-shaped slit is provided in the direction perpendicular to the line connecting the
One side wall constituting the strip-shaped slit curves smoothly and transitions to the wall surface on the exit end side of the wall surface where the slit exists,
The other side wall constituting the strip-shaped slit is bent at a right or acute angle at the point where the opposing side wall starts to curve smoothly, or at a right angle or an acute angle before the point where the opposite side wall begins to curve smoothly, and the wall surface where the slit is present is formed. The inlet end of the cylindrical body is formed to be open to the outside environment, the outlet end is formed to connect to the pipe, and the outer end of the cylindrical body is connected to the conduit. It is equipped with a 1L stage into which fluid is pressurized.
そのＪｊ体画描造の一例としてモ型のものを第３図及び
第４図により説明すると、第３図は側断面図、第４図は
１１面図で、吸引ノズル１０は、周囲が四つのｉＢｒ
ｉ Ｉ Ａ及びＩＩＢ（同じ側の壁であるが、中間に後
述する細隙が存在するので、説明の便宜Ｉ−凶分して名
付ける）、１２．１３及び１４で囲まれ１人「１嬬１５
と出口端１６とを有する角１．１体における壁面の少な
くとも−・部、図ではｌＩＡ及びＩＩＢの側の壁面に、
入［ｉ端１５の中心と出目端Ｉ６の中心とを結ぶ線（第
４図に破線Ａ−Ａで示す）に対して直角方向に帯状の細
隙１７が設けられている。As an example of the JJ body drawing, the model type is explained with reference to FIGS. 3 and 4. FIG. 3 is a side sectional view, and FIG. 4 is an 11th view. one iBr
i I A and IIB (these are the walls on the same side, but there is a slit in the middle that will be described later, so for convenience of explanation, I will divide them into names), 12. Surrounded by 13 and 14, 1 person 15
Corner 1.1 having an exit end 16 and at least a part of the wall in the body, in the figure on the side lIA and IIB,
A strip-shaped slit 17 is provided in a direction perpendicular to a line connecting the center of the inlet end 15 and the center of the outgoing end I6 (indicated by a broken line A-A in FIG. 4).
その帯状の細隙１７を構成している一方の側壁１８は滑
らかに湾曲して細隙が存在する壁面（ＩＩＡ及びＩＩＢ
よりなる）の出ｒＪ端側の壁面１３Ａに移行し、帯状の
細隙を構成している他方の側壁１９は対向する側壁が滑
らかに湾曲し始める位置（第３図にＢで示す）で鋭角的
に折れ曲って細隙が存在する壁面の人「Ｉ端側の壁面１
３Ｂに移行している形状を有し、角筒体の入［１端１５
は外部環境に開［コシ、出口端１６には出口管２０が設
けられて管路に接続するように形成されている。。One side wall 18 constituting the band-shaped slit 17 is smoothly curved and the wall surface where the slit exists (IIA and IIB
The other side wall 19 forming the strip-shaped slit forms an acute angle at the position where the opposing side wall begins to curve smoothly (as shown by B in Fig. 3). A person on a wall surface that is bent and has a slit "Wall surface 1 on the I end side"
3B, and the rectangular cylinder has an inlet [1 end 15
The outlet end 16 is provided with an outlet pipe 20 that is open to the outside environment and is configured to connect to a conduit. .
また帯状の細隙１７の外側から流体を圧入する一ｒ段と
して、加圧流体送入管２１及び細隙１８の外側に通じる
加圧流体分配室２２を備えている。Further, as a first stage for pressurizing fluid into the strip-shaped slit 17 from outside, a pressurized fluid inlet pipe 21 and a pressurized fluid distribution chamber 22 communicating with the outside of the slit 18 are provided.
このコアンダ効果を利用中る吸引ノズルの作用機構を説
明すると１．細隙１８の外側から流体（気体でも液体で
もよい）を圧入すると、その流体は細隙１８の出［Ｔで
自由空間に出るが、細隙を構成している −刀の側１；
ｊ ｌ ９は細隙用ＩＩで鋭角ｒｌ’Ｊに折れ曲ってい
るために、この側には細隙を出て１”Ｉ ＋ｔ、＋空間
を流れる流体に触れるＩＶ面は存在しないことになる。The working mechanism of the suction nozzle that utilizes this Coanda effect will be explained as follows: 1. When fluid (gas or liquid may be used) is injected from the outside of the slit 18, the fluid exits the slit 18 into free space at [T], which forms the slit - side 1 of the sword;
Since j l 9 is the slit II and is bent at an acute angle rl'J, there is no IV surface on this side that comes into contact with the fluid that exits the slit and flows through the 1"I +t, + space. .
これは側壁１９が対向する側壁１８が滑らかに湾曲し始
める位置よりＦ前で折れ曲っている場合、又は側壁１９
がｍＪ隙出口で直角に折れ曲っている場合も同様である
。This occurs when the side wall 19 is bent before the position F where the opposing side wall 18 starts to curve smoothly, or when the side wall 19
The same applies when the mJ gap is bent at a right angle at the exit.
これに対し細隙を構成している他方の側壁１８は滑らか
に湾曲してＩＦｕ’ｊ ｌ ３ Ａに移行しているため
に、前述の如くコアンダ効果により細隙を出た流体は矢
印Ｃの如く湾曲面２３に添って流れ、出［１方向に向う
−
この圧入された流体（１次流体）の湾曲の反対側（第３
図では左側）には負圧域を生じるので、その負圧域に開
口部から外部環境に存在する流体（２次流体）が矢印り
の如くｆ々れ込み、１次流体と合流して出口方向に向う
。On the other hand, the other side wall 18 constituting the slit curves smoothly and transitions to IFu'j l 3 A, so the fluid exiting the slit moves in the direction of arrow C due to the Coanda effect as described above. The fluid flows along the curved surface 23 as shown in FIG.
Since a negative pressure area is generated in the area (on the left side in the figure), fluid (secondary fluid) existing in the external environment flows into the negative pressure area from the opening as shown by the arrow, merges with the primary fluid, and exits. Head in the direction.
Ｌ４１１ち細隙から工法流体を圧入すれば、１ＪＪＩ口
部から外部環境に存在する流体が吸引される。これがコ
アンダ効果を利用する吸引ノズルの作用原理である。When the construction method fluid is forced into the slit L411, the fluid present in the external environment is sucked from the 1JJI opening. This is the working principle of a suction nozzle that utilizes the Coanda effect.
従ってこの吸引ノズルを養魚場の水底付近で使用すれば
、歿が１や糞よりなる沈降物は水と共に吸い一ゲせられ
、管路により移送されることになる。Therefore, if this suction nozzle is used near the bottom of the water in a fish farm, the sediment consisting of spores and feces will be sucked up along with the water and transported through the pipe.
第５図は円筒形に構成した吸引ノズルの構造を断面図で
示したもので、第３図に示した断面構造を回転体とした
形状のものである。この場合帯状のｆａ隙１７は、円筒
管を構成する壁１１７ｉ ２４ Ａと２４Ｂとの間に環
状の細隙となって存在することになる。作用機構は第３
図及び第４図に示したＶ型のものと同様である。FIG. 5 is a cross-sectional view showing the structure of a suction nozzle having a cylindrical shape, and the cross-sectional structure shown in FIG. 3 is a rotating body. In this case, the band-shaped fa gap 17 exists as an annular slit between the walls 117i 24A and 24B that constitute the cylindrical tube. The mechanism of action is the third
It is similar to the V-shaped one shown in FIGS.
コアンダ効果を利用する吸引ノズルを作動させる −次
流体としては圧縮空気又は高圧水を用いればよく、構造
がｖＪ巾で、機械的駆動部分がないので、故障の恐れが
ない。Activating the suction nozzle using the Coanda effect - Compressed air or high-pressure water can be used as the secondary fluid, and since the structure is vJ width and there are no mechanically driven parts, there is no risk of failure.
水に懸濁した状態、−次論体として圧縮空気を用いた場
合は気・液・Ｉノｊの三相流の状態で管路を移送される
。移送後或いは移送中に適当な力法で脱水すれば、沈降
物は固形物として処理できる。When compressed air is used as the liquid, it is transported through the pipe in a state suspended in water, and in a three-phase flow of gas, liquid, and liquid. The sediment can be treated as a solid if it is dehydrated by an appropriate force method after or during transportation.
艶」
コアンダ効果を利用する吸引ノズルを使用することによ
り、水底付近を流れる水流を生起させ。By using a suction nozzle that utilizes the Coanda effect, a water flow is created near the bottom of the water.
その水流とＪ（に吸引するので、水底の土砂や無機質の
堆積層の原状を損なうことなく、残餌等の沈降物を排出
することができる。Since it is sucked into the water flow and J(), sediment such as leftover bait can be discharged without damaging the original condition of the sediment and mineral deposits on the bottom of the water.
圧縮空気又は高圧水の圧入により吸引効果を生じるので
、吸引ポンプと児なり使用水深に制限がない。Since the suction effect is created by injecting compressed air or high-pressure water, there is no limit to the depth of water that can be used in conjunction with a suction pump.
発明の効界
１ 養魚場における残餌や糞等の沈降物を排出すること
により養殖魚類の衛生環境を良好に保ち、赤潮Ｔによる
被害を未然に防１１：できる。。Effectiveness of the invention 1 By discharging sediments such as leftover feed and feces in a fish farm, a good sanitary environment for farmed fish can be maintained, and damage caused by red tide T can be prevented. .
第１図は未発明の実施態様の・例を示す図、第び第５図
は本発明において使用するコアンダ効果を利用する吸引
ノズルの構造を説明するための図で、第３図及び第４図
は中−型のもの、第５図は円筒形のものを示す。FIG. 1 is a diagram showing an example of an uninvented embodiment, FIG. 5 is a diagram for explaining the structure of a suction nozzle utilizing the Coanda effect used in the present invention, and FIGS. The figure shows a medium-sized one, and FIG. 5 shows a cylindrical one.
Claims (1)
する吸引ノズルを用いて水底付近に生起させた水流と共
に吸引し、管路により移送することよりなる養魚場残餌
排出方法。 ２ コアンダ効果を利用する吸引ノズルが、周囲が壁で
囲まれ入口端と出口端とを有する筒体における壁面の少
なくとも一部に、入口端の中心と出口端の中心とを結ぶ
線に対して直角方向に帯状の細隙が設けられ、その帯状
の細隙を構成している一方の側壁は滑らかに湾曲して細
隙が存在する壁面の出口端側の壁面に移行し、帯状の細
隙を構成している他方の側壁は対向する側壁が滑らかに
湾曲し始める位置又はそれより手前で直角又は鋭角的に
折れ曲って細隙が存在する壁面の入口端側の壁面に移行
している形状を有し、前記筒体の入口端は外部環境に開
口し、出口端は管路に接続するように形成されていると
共に、前記帯状の細隙の外側から流体を圧入する手段を
備えているものである特許請求の範囲第１項に記載の養
魚場残餌排出方法。 ３ 水面から水底までの深さを検出し、コアンダ効果を
利用する吸引ノズルと水底との間の距離を一定に制御す
ることよりなる特許請求の範囲第１項又は第２項記載の
養魚場残餌排出方法。[Scope of Claims] 1. Fish farm leftover feed, which is obtained by suctioning sediment near the water bottom of a fish farm together with a water flow generated near the water bottom using a suction nozzle that utilizes the Coanda effect, and transporting it through a pipe. Discharge method. 2. A suction nozzle that utilizes the Coanda effect is attached to at least a portion of the wall surface of a cylinder surrounded by a wall and having an inlet end and an outlet end, with respect to a line connecting the center of the inlet end and the center of the outlet end. A strip-shaped slit is provided in the perpendicular direction, and one side wall constituting the strip-shaped slit is smoothly curved and transitions to the wall surface on the exit end side of the wall surface where the slit exists, and the strip-shaped slit is formed. The other side wall constituting the wall is bent at a right or acute angle at or before the point where the opposing side wall begins to curve smoothly and transitions to the wall surface on the entrance end side of the wall surface where the slit exists. The inlet end of the cylindrical body is open to the external environment, the outlet end is formed to connect to a conduit, and is provided with means for pressurizing fluid from outside the strip-shaped slit. A method for discharging leftover feed from a fish farm according to claim 1. 3. Fish farm residue according to claim 1 or 2, which comprises detecting the depth from the water surface to the water bottom and controlling the distance between the suction nozzle using the Coanda effect and the water bottom to a constant value. Bait discharge method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2602086A JPS62186729A (en) | 1986-02-10 | 1986-02-10 | Method for discharging residual bast of fish breeding basin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2602086A JPS62186729A (en) | 1986-02-10 | 1986-02-10 | Method for discharging residual bast of fish breeding basin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62186729A true JPS62186729A (en) | 1987-08-15 |
Family
ID=12182012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2602086A Pending JPS62186729A (en) | 1986-02-10 | 1986-02-10 | Method for discharging residual bast of fish breeding basin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62186729A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01130806U (en) * | 1988-03-02 | 1989-09-06 | ||
| JPH0581001U (en) * | 1992-04-01 | 1993-11-02 | 東急建設株式会社 | Sandbag filling device |
-
1986
- 1986-02-10 JP JP2602086A patent/JPS62186729A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01130806U (en) * | 1988-03-02 | 1989-09-06 | ||
| JPH0511682Y2 (en) * | 1988-03-02 | 1993-03-24 | ||
| JPH0581001U (en) * | 1992-04-01 | 1993-11-02 | 東急建設株式会社 | Sandbag filling device |
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