JPS644473Y2 - - Google Patents
Info
- Publication number
- JPS644473Y2 JPS644473Y2 JP11208286U JP11208286U JPS644473Y2 JP S644473 Y2 JPS644473 Y2 JP S644473Y2 JP 11208286 U JP11208286 U JP 11208286U JP 11208286 U JP11208286 U JP 11208286U JP S644473 Y2 JPS644473 Y2 JP S644473Y2
- Authority
- JP
- Japan
- Prior art keywords
- sewage treatment
- ceramic
- socket
- sewage
- protrusion
- 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.)
- Expired
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- 239000000919 ceramic Substances 0.000 claims description 78
- 239000010865 sewage Substances 0.000 claims description 71
- 238000011282 treatment Methods 0.000 claims description 60
- 229910052573 porcelain Inorganic materials 0.000 claims description 7
- 239000002689 soil Substances 0.000 description 25
- 238000000034 method Methods 0.000 description 9
- 238000000746 purification Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 241001465754 Metazoa Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 241000588724 Escherichia coli Species 0.000 description 1
- 241000361919 Metaphire sieboldi Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 239000006259 organic additive Substances 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Sewage (AREA)
- Treatment Of Biological Wastes In General (AREA)
Description
【考案の詳細な説明】
〈産業上の利用分野〉
本考案は、土壌に生息している土壌動物、土壌
微生物等を活用しこれらの物理的、化学的性質を
利用して汚水汚泥を浄化する土壌浄化法と称され
る汚水処理方法に使用される汚水処理用陶管に関
する。[Detailed description of the invention] <Industrial application field> This invention utilizes soil animals, soil microorganisms, etc. that live in the soil, and uses their physical and chemical properties to purify sewage sludge. This invention relates to ceramic pipes for sewage treatment used in a sewage treatment method called the soil purification method.
〈従来の技術〉
従来、汚水や汚泥等は浄化槽等の大規模な装置
が用いられ大量の汚水、汚泥を一箇所に集めて処
理を行つていたが、こうした処理方法は、上記装
置の製造ないし設置費用がかかる等の理由から、
土壌に生息する微生物等によつて汚水を浄化する
土壌浄化方法が提案されている。<Conventional technology> Conventionally, large-scale equipment such as septic tanks have been used to collect large amounts of sewage and sludge in one place for treatment. Or for reasons such as installation costs, etc.
A soil purification method has been proposed in which wastewater is purified using microorganisms living in the soil.
この土壌浄化方法は、第5図及び第6図に示す
ように、地表下約1メートル位の深さに掘つた溝
の底部に、合成樹脂膜等による不透膜101を上
記溝の底部にコ字状に敷き、この不透膜101の
上に粗砂もしくは毛管砂102、汚水を流す陶管
103、そしてこの陶管103を埋める砂利10
4、毛管網と称される網105を下から順番に敷
き、さらにこの上に泥炭、ミミズの糞粒及び余剰
汚泥などを有機添加剤として現地土壌と混合した
毛管改良土壌106と称される土を敷いたもので
あり、上記陶管は一定の間隔を置いて設置しこの
陶管103と陶管103からの間から流出した汚
水を上記毛管改良土壌106に生息している土壌
微生物、土壌動物の化学的性質等を利用すること
によつて上記汚水等を浄化しようとするものであ
る。 In this soil purification method, as shown in Figures 5 and 6, an impermeable membrane 101 made of a synthetic resin membrane or the like is placed at the bottom of a trench dug to a depth of about 1 meter below the ground surface. Coarse sand or capillary sand 102 is placed on the impermeable membrane 101, a ceramic pipe 103 for draining waste water is placed in a U-shape, and gravel 10 is used to fill the ceramic pipe 103.
4. A net 105 called a capillary net is laid in order from the bottom, and on top of this is soil called capillary improved soil 106, which is mixed with local soil using organic additives such as peat, earthworm feces, and surplus sludge. The ceramic tubes are placed at regular intervals, and the sewage flowing out from between the ceramic tubes 103 is used to collect soil microorganisms and soil animals living in the capillary improved soil 106. The purpose is to purify the above-mentioned sewage by utilizing the chemical properties of water.
この浄化法によれば常住の管理者が不要であ
り、維持管理が容易で安価であること、また悪臭
や大腸菌などが周囲に飛散せず衛生的であること
等の理由により、近年国や地方自治体によつて使
用されている。 This purification method does not require a permanent resident manager, is easy and inexpensive to maintain, and is hygienic as it does not spread bad odors or E. coli to the surrounding area. Used by local governments.
〈考案が解決しようとする問題点〉
上記土壌浄化法は、土中に多数配設した陶管と
陶管との隙間から排出された汚水等をこの排出土
付近の土壌の持つ化学的性質により浄化するもの
である。<Problems to be solved by the invention> The above soil purification method uses the chemical properties of the soil near the discharged soil to collect sewage, etc. discharged from the gaps between the ceramic pipes, which are placed in large numbers in the soil. It purifies.
ところで、上述のような方法により汚水を浄化
するためには、上記陶管と陶管との隙間付近の土
壌の汚水を処理する単位面積あたりの処理能力に
は一定の限界があるので、上記土中に配設する陶
管と陶管の隙間は常に上記陶管付近の土壌の処理
能力に応じた間隔に保持する必要がある。 By the way, in order to purify sewage using the method described above, there is a certain limit to the processing capacity per unit area for treating sewage in the soil near the gaps between the ceramic pipes. The gap between the ceramic tubes placed inside must always be maintained at a distance that corresponds to the treatment capacity of the soil near the ceramic tubes.
しかしながら、従来この陶管と陶管との隙間
は、工事を行う者が上記陶管を配設する際に適宜
に陶管と陶管をづらせて行つていたため、一部の
箇所では上記隙間が空きすぎて土壌の処理能力以
上の汚水が流出したり、逆に狭せますぎて汚水が
全く流出せず土壌の持つ浄化機能を発揮できない
場合があつた。 However, in the past, this gap between the ceramic pipes was created by the person doing the construction by shifting the ceramic pipes appropriately when installing the ceramic pipes, so in some places the gaps between the ceramic pipes were There have been cases where the gaps are too open and more sewage than the soil's processing capacity flows out, and conversely, the gaps are too narrow and no sewage flows out at all, making it impossible for the soil to perform its purifying function.
そこで本考案は、多数の陶管と陶管との接続位
置付近の土壌の処理能力に応じた間隔を常に一定
に保持して設置することができる汚水処理用陶管
を提供するものである。 Therefore, the present invention provides a ceramic pipe for sewage treatment that can be installed with a constant interval between a large number of ceramic pipes and the vicinity of the connection position of the ceramic pipe in accordance with the soil treatment capacity.
〈問題点を解決するための手段〉
本考案は上述の問題点に鑑み考案したものであ
り、内部が空洞で全体が略円筒形状の汚水処理用
陶管本体の長手方向の一端に上記汚水処理用陶管
より長径の承口が設けられ他端には上記汚水処理
用陶管本体と同径の挿口が設けられている汚水処
理用陶管であつて、この汚水処理用陶管の一つに
他の汚水処理用陶管を接続する際、この承口の内
側面と上記他の汚水処理用陶管の挿口の外側面の
いずれか一方が他方に突き当たるように相対配設
した複数の突部と、上記承口の内側面と上記挿口
の先端面とのいずれか一方が他方に突き当たるよ
うに相対配設した突部とを有することを特徴とす
る汚水処理用陶管である。<Means for Solving the Problems> The present invention was devised in view of the above-mentioned problems. This ceramic pipe for sewage treatment is provided with a socket having a longer diameter than that of the ceramic pipe for sewage treatment, and the other end is provided with a socket having the same diameter as the main body of the ceramic pipe for sewage treatment. When connecting another sewage treatment ceramic pipe to the sewage treatment pipe, a plurality of sewage treatment pipes are arranged relative to each other so that one of the inner surface of the socket and the outside surface of the socket of the other sewage treatment ceramic pipe abuts against the other. A ceramic pipe for sewage treatment, characterized in that it has a protrusion, and a protrusion disposed relative to each other so that one of the inner surface of the receptacle and the tip end surface of the receptacle abuts the other. .
〈作用〉
本考案である汚水処理用陶管は、上述のように
この陶管本体の長手方向の一端に陶管本体のより
も長径の承口と他端に陶管本と同径の挿口が設け
られているので、上記承口に上記挿口を挿通する
ことによつて複数の陶管を接続させることができ
る。<Function> As mentioned above, the ceramic tube for sewage treatment of the present invention has a socket with a longer diameter than the ceramic tube main body at one end in the longitudinal direction of the ceramic tube body, and an insertion hole with the same diameter as the ceramic tube main body at the other end. Since the opening is provided, a plurality of ceramic tubes can be connected by inserting the insertion opening into the socket.
そして、この汚水処理用陶管には、他の汚水処
理用陶管と接続されたとき、この汚水処理用陶管
に設けられている挿口の先端面が汚水処理用陶管
本体の上記承口の内周面に当接する位置に、挿口
の先端面又は陶汚水処理用陶管本体の内周面のい
ずれか一方に複数の突部が相対配設されているの
で、接続される軸方向の位置決めをすることがで
き、常に上記突部の長さの隙間を保持して接続す
ることができる。 When this ceramic tube for sewage treatment is connected to another ceramic tube for sewage treatment, the tip end surface of the socket provided in this ceramic tube for sewage treatment is connected to the above-mentioned connector of the ceramic tube for sewage treatment. A plurality of protrusions are arranged relative to each other on either the tip of the inlet or the inner circumferential surface of the ceramic sewage treatment pipe body at a position that contacts the inner circumferential surface of the spout, so that the shaft to be connected directional positioning, and connection can be made while always maintaining a gap equal to the length of the protrusion.
さらに、上記接続された陶管の承口又は挿口の
いずれか一方には承口の内周面又は挿口の外周面
のいづれか一方が他方に突き当たる突部が複数個
相対配設されているので、上述のように接続され
た汚水処理用陶管の径方向の位置決めをすること
ができる。 Further, on either the socket or the socket of the connected ceramic pipe, a plurality of protrusions are arranged relative to each other so that either the inner peripheral surface of the socket or the outer peripheral surface of the socket abuts the other. Therefore, the radial positioning of the sewage treatment ceramic pipes connected as described above can be performed.
従つて上記軸方向の位置決め作用を発揮する突
部と上記径方向の位置決め作用を発揮する突部と
があいまつて汚水処理用陶管と汚水処理用陶管と
の隙間を常に一定に保持することができ、汚水処
理用陶管の内部を流れる汚水を適量分万遍なく外
部に流出させることができる。 Therefore, the protrusion that exerts the positioning function in the axial direction and the protrusion that exerts the positioning function in the radial direction work together to maintain a constant gap between the sewage treatment ceramic pipes. This allows an appropriate amount of the wastewater flowing inside the sewage treatment ceramic pipe to be evenly discharged to the outside.
さらに、上記突部の大きさを適宜変えて製造す
ることにより、家庭や工事等に置いて排出される
汚水の量に応じた使用(例えば工場での汚水は大
量であることから或る程度突部を大きくし、家庭
では少量であることから突部を小さくする等。)
をすることができる。 Furthermore, by manufacturing the above-mentioned protrusions with appropriate sizes, it is possible to use them in accordance with the amount of sewage discharged from homes and construction sites (for example, since sewage from factories is large, it can be used to some extent). (For example, make the protrusion smaller because it is consumed in small quantities at home.)
can do.
〈実施例〉
以下本考案の一実施例を図面を参照しながら詳
細に説明する。<Example> An example of the present invention will be described in detail below with reference to the drawings.
本考案である汚水処理用陶管は、第1図に示す
ように、内部が空洞で全体が略円筒形状をしてい
る陶管本体1の長手方向の一端には承口2が、他
端には挿口3がそれぞれ設けられている。 As shown in Fig. 1, the ceramic tube for sewage treatment according to the present invention has a hollow interior and a generally cylindrical shape. are each provided with a socket 3.
上記承口2は、上記陶管本体1の一端側中途部
から上記陶管本体1の外径方向に開口するように
やや陶管本体1の径よりも長径とされている。ま
た、上記陶管本体1の他端に設けられた挿口3は
上記陶管本体1と同径とさている。陶管本体1に
設けられたこれらの承口2、挿口3によつて他の
汚水処理用陶管の承口2a、挿口3aとそれぞれ
接続され第2図に示すように多数の汚水処理用陶
管を接続することができるようにされている。 The receptacle 2 has a longer diameter slightly larger than the diameter of the porcelain tube body 1 so that it opens in the direction of the outer diameter of the porcelain tube body 1 from a midway point on one end side of the porcelain tube body 1. Further, the socket 3 provided at the other end of the ceramic tube body 1 has the same diameter as the ceramic tube body 1. These sockets 2 and 3 provided on the ceramic pipe body 1 are connected to the sockets 2a and 3a of other sewage treatment ceramic pipes, respectively, so that a large number of sewage treatments can be carried out as shown in Fig. 2. It is possible to connect ceramic pipes.
そして、上記陶管本体1の端部に設けられた承
口2又は挿口3には二種類の突部4,5がそれぞ
れ設けられている。この内、一の突部4は本実施
例の場合、第1図及び第2図に示すように、上記
挿口3の先端部6に陶管本体1の長手方向に突設
されている。この突部4によつて、上記他の汚水
処理用陶管に設けられている承口2aに接続した
際、この承口2aの内周面の基部2bに当接し一
方の汚水処理用陶管と他方の汚水処理用陶管との
間で陶管本体1の軸方向の位置決めがなされる。 Two types of protrusions 4 and 5 are provided in the socket 2 or the socket 3 provided at the end of the ceramic tube body 1, respectively. In this embodiment, one of the protrusions 4 is provided at the tip 6 of the insertion port 3 to protrude in the longitudinal direction of the ceramic tube body 1, as shown in FIGS. 1 and 2. By means of this protrusion 4, when connected to the socket 2a provided on the other ceramic pipe for sewage treatment, it comes into contact with the base 2b of the inner peripheral surface of this socket 2a, and the one of the ceramic pipes for sewage treatment The porcelain tube body 1 is positioned in the axial direction between the sewage treatment porcelain tube and the other sewage treatment porcelain tube.
また、上記他の突部5は、本実施例の場合上記
挿口3の先端外周部に3つ配設さられており、上
記他の汚水処理用陶管の承口2aに挿入した場合
に上記承口2aの内周面に当接する長さとされて
いる。 In addition, in this embodiment, three of the other protrusions 5 are provided on the outer periphery of the tip of the socket 3, and when inserted into the socket 2a of the other ceramic pipe for sewage treatment. The length is such that it comes into contact with the inner circumferential surface of the socket 2a.
これらの突部4,5を設けた汚水処理用陶管の
挿口3を上記他の汚水処理用陶管の承口2aに挿
入して接続することによつて、上記突部4により
陶管本体1の軸方向の位置決めがなされ、また上
記他の突部5によつて径方向の位置決めがなされ
る。この軸方向の位置決め及び径方向の位置決め
によつて互いに接続される汚水処理用陶管は、確
実に一定の隙間を保持することができ、この隙間
によつて汚水処理用陶管の外部に万遍なく汚水を
流出させることができる。 By inserting and connecting the socket 3 of the ceramic pipe for sewage treatment provided with these projections 4 and 5 to the socket 2a of the other ceramic pipe for sewage treatment, the projection 4 allows The main body 1 is positioned in the axial direction, and the other protrusion 5 is used to position the main body 1 in the radial direction. Through this axial positioning and radial positioning, the sewage treatment ceramic tubes that are connected to each other can reliably maintain a certain gap, and this gap ensures that there is no leakage from the outside of the sewage treatment ceramic tubes. Sewage can be discharged evenly.
なお、本考案である汚水処理用陶管は、上記二
種類の突部4,5を陶管本体1の挿口3に設けて
適用したものばかりでなく、上記突部4又は5の
いずれか一方又は両方を上記承口2に設けて適用
しても良い。例えば、第3図及び第4図に示すよ
うに上記突部4,5を上記承口2の内側面に設け
て本考案を適用しても良い。この実施例では上記
一方の突部4は、上記承口2の内周面側であつ
て、上記承口2に挿入される他の汚水処理用陶管
の挿口3aの先端面が当接する位置、すなわち上
記承口2の基部2bに4つ分散されて形成されて
いる。そして、他の突部5は、上記承口2の内周
面であつて、上記挿口3aがこの承口2に挿入さ
れた場合に上記挿口3aの外周面に当接するよう
に形成されている。 In addition, the ceramic pipe for sewage treatment according to the present invention is not limited to the one in which the above two types of protrusions 4 and 5 are provided in the socket 3 of the ceramic pipe main body 1, but also the one in which either of the above-mentioned protrusions 4 or 5 is applied. Either or both may be provided in the receptacle 2 for application. For example, as shown in FIGS. 3 and 4, the present invention may be applied by providing the protrusions 4 and 5 on the inner surface of the socket 2. In this embodiment, one of the protrusions 4 is on the inner peripheral surface side of the socket 2, and is in contact with the tip end surface of the socket 3a of another ceramic pipe for sewage treatment inserted into the socket 2. In other words, four are formed in a distributed manner at the base 2b of the socket 2. The other protrusion 5 is formed on the inner circumferential surface of the receptacle 2 so as to come into contact with the outer circumferential surface of the receptacle 3a when the receptacle 3a is inserted into the receptacle 2. ing.
このように形成された汚水処理用陶管は、前記
実施例と同様、上記突部4により陶管本体1の軸
方向の位置決めがなされ、また上記他の突部5に
よつて径方向の位置決めがなされる。この軸方向
の位置決め及び径方向の位置決めによつて互いに
接続される汚水処理用陶管は、確実に一定の隙間
を保持ることができ、この隙間によつて汚水処理
用陶管の外部に万遍なく汚水を流出させることが
できる。 In the thus formed ceramic tube for sewage treatment, the protrusion 4 positions the ceramic tube body 1 in the axial direction, and the other protrusion 5 determines the radial position. will be done. Through this axial positioning and radial positioning, the sewage treatment ceramic tubes that are connected to each other can reliably maintain a certain gap, and this gap ensures that there is no leakage from the outside of the sewage treatment ceramic tubes. Sewage can be discharged evenly.
〈考案の効果〉
本考案は、上記実施例の説明からも明らかなよ
うに、汚水処理用陶管に設けられている承口又は
挿口に複数の突部が形成され、この突部によつて
多数接続される汚水処理用陶管の軸方向の位置決
め及び径方向の位置決めをすることができる。<Effects of the invention> As is clear from the description of the above embodiments, the present invention has a plurality of protrusions formed on the socket or socket provided in the ceramic pipe for sewage treatment. This enables axial and radial positioning of a large number of connected ceramic pipes for sewage treatment.
そしてこの位置決めによつて、汚水処理用陶管
と汚水処理用陶管との間に一定の隙間を保持する
ことができるので、上記汚水処理用陶管の内部を
流れる汚水は上記突部の大きさによつて一定の量
確実に汚水処理用陶管の外部に流出させることが
できる。したがつて土壌の処理能力に相応した汚
水の流出を確保することができる。 With this positioning, a certain gap can be maintained between the sewage treatment ceramic tube and the sewage treatment ceramic tube, so that the sewage flowing inside the sewage treatment ceramic tube is Depending on the method, a certain amount can be reliably discharged to the outside of the sewage treatment ceramic pipe. Therefore, it is possible to ensure that sewage flows out in a manner commensurate with the treatment capacity of the soil.
また、汚水処理用陶管に突部を設けたものであ
ることから、製造上も簡単であり、さらに、この
汚水処理用陶管を土壌に設置する場合も、容易に
陶管と陶管の位置決めをすることができるので、
簡易迅速な設置工事を実現することができる。 In addition, since it is a ceramic pipe for sewage treatment with a protrusion, it is easy to manufacture.Furthermore, when installing this ceramic pipe for sewage treatment in soil, it is easy to separate the ceramic pipe from the other. Because positioning can be done,
Simple and quick installation work can be achieved.
第1図は、本考案である汚水処理用陶管の斜視
図である。第2図は、本考案である汚水処理用陶
管を接続した状態を示す断面図である。第3図
は、他の実施例の斜視図であり、第4図は、同じ
く他の実施例の接続状態を示す要部断面図であ
る。第5図は、土壌浄化法により設置される汚水
処理用陶管の断面図である。第6図は、第5図の
横断面図である。
1……陶管本体、2……承口、3……挿口、4
……突部、5……突部。
FIG. 1 is a perspective view of a ceramic tube for sewage treatment according to the present invention. FIG. 2 is a sectional view showing a connected state of the ceramic pipe for sewage treatment according to the present invention. FIG. 3 is a perspective view of another embodiment, and FIG. 4 is a sectional view of a main part similarly showing the connection state of another embodiment. FIG. 5 is a cross-sectional view of a ceramic pipe for sewage treatment installed according to the soil purification method. FIG. 6 is a cross-sectional view of FIG. 5. 1...Ceramic tube body, 2...Socket, 3...Socket, 4
... protrusion, 5... protrusion.
Claims (1)
管本体の長手方向の一端に上記汚水処理用陶管よ
り長径の承口が設けられ他端には上記汚水処理用
陶管本体と同径の挿口が設けられている汚水処理
用陶管であつて、この汚水処理用陶管の一つに他
の汚水処理用陶管を接続する際、この承口の内側
面と上記他の汚水処理用陶管の挿口の外側面のい
ずれか一方が他方に突き当たるように相対配設し
た複数の突部と、上記承口の内側面と上記挿口の
先端面とのいずれか一方が他方に突き当たるよう
に相対配設した突部とを有することを特徴とする
汚水処理用陶管。 A sewage treatment ceramic tube body having a hollow interior and a generally cylindrical shape as a whole is provided with a socket having a longer diameter than the sewage treatment ceramic tube body at one end in the longitudinal direction, and the other end has the same diameter as the sewage treatment ceramic tube body. This is a ceramic pipe for sewage treatment that is equipped with a socket for sewage treatment, and when connecting one of the ceramic pipes for sewage treatment to another ceramic pipe for sewage treatment, the inside surface of this socket and the above-mentioned other sewage A plurality of protrusions are arranged relative to each other so that one of the outer surfaces of the socket of the processing porcelain tube abuts the other, and one of the inner surface of the socket and the tip surface of the socket is connected to the other. A ceramic pipe for sewage treatment characterized by having a protrusion arranged relative to the protrusion so as to abut against the protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11208286U JPS644473Y2 (en) | 1986-07-23 | 1986-07-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11208286U JPS644473Y2 (en) | 1986-07-23 | 1986-07-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6320998U JPS6320998U (en) | 1988-02-12 |
| JPS644473Y2 true JPS644473Y2 (en) | 1989-02-06 |
Family
ID=30992615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11208286U Expired JPS644473Y2 (en) | 1986-07-23 | 1986-07-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS644473Y2 (en) |
-
1986
- 1986-07-23 JP JP11208286U patent/JPS644473Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6320998U (en) | 1988-02-12 |
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