JPS61257250A - Method and device for disposing garbage in sewage relay pumpstation - Google Patents
Method and device for disposing garbage in sewage relay pumpstationInfo
- Publication number
- JPS61257250A JPS61257250A JP60098437A JP9843785A JPS61257250A JP S61257250 A JPS61257250 A JP S61257250A JP 60098437 A JP60098437 A JP 60098437A JP 9843785 A JP9843785 A JP 9843785A JP S61257250 A JPS61257250 A JP S61257250A
- Authority
- JP
- Japan
- Prior art keywords
- garbage
- sewage
- pit
- dust
- water pipe
- 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.)
- Granted
Links
Landscapes
- Processing Of Solid Wastes (AREA)
- Disintegrating Or Milling (AREA)
- Sewage (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】
(産業上の利用分野)
本発明は、下水中継ポンプ場における塵芥処理方法及び
その装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for treating garbage in a sewage relay pumping station.
(従来の技術)
一般に、下水中継ポンプ場においては、下水を下水流入
路からピットに流入させて、このピット内に貯留された
下水をポンプにより下水処理場等へと送水させるように
しているが、ピットに流入する下水中には大形固形物等
の種々の塵芥が含まれているため、従来からも、かかる
塵芥をポンプに吸込まれる前に処理することが行われて
いる。(Prior Art) Generally, in a sewage relay pump station, sewage is made to flow into a pit from a sewage inflow channel, and the sewage stored in this pit is sent to a sewage treatment plant etc. by a pump. Since the sewage flowing into the pit contains various types of debris such as large solids, it has been conventional practice to treat such debris before it is sucked into the pump.
すなわち、従来においては、下水中の塵芥を。In other words, in the past, garbage in sewage.
ポンプに吸込まれる前の段階で除塵機等により下水から
分離除去して、焼却炉で焼却処理したり或いは埋立地に
投棄させるようにする(以下「前者の処理方法」という
)とか、前記塵芥をピットへの流入前の段階で水中破砕
機により細かく破砕させ、これを下水と共にピットに流
入させ且つポンプにより圧送させるようにする(以下「
後者の処理方法」という)ことが行われている。The wastewater may be separated from the sewage water using a dust remover or the like before it is sucked into the pump, and then incinerated in an incinerator or dumped in a landfill (hereinafter referred to as the "former treatment method"). Before it flows into the pit, it is crushed finely by an underwater crusher, and then flowed into the pit together with sewage water and pumped (hereinafter referred to as "
The latter method is currently being used.
(発明が解決しようとする問題点)
ところが、前者の処理方法によれば、下水中から分離除
去した塵芥を貯蔵及び搬出させるための設備若しくはス
ペースを必要とし、しかも貯蔵時若しくは運搬車等によ
る積込、運搬時に塵芥が悪臭を放ち、公害問題が生じる
ことになる。(Problems to be Solved by the Invention) However, the former treatment method requires equipment or space for storing and transporting the waste separated and removed from sewage, and moreover, it requires equipment or space for storing and transporting the waste separated and removed from the sewage, and moreover, it is difficult to carry out the waste during storage or loading by a transport vehicle, etc. When the garbage is packed and transported, it emits a foul odor, creating a pollution problem.
また、後者の処理方法によれば、塵芥を細かく破砕する
とはいえ、多量の塵芥がピット内に入りポンプを通過す
るから、ピット内にスカムが発生したり、ポンプが詰ま
って故障し易いといった問題を生じる。In addition, according to the latter treatment method, although the garbage is finely crushed, a large amount of garbage enters the pit and passes through the pump, which causes problems such as scum forming in the pit and the pump becoming clogged and easily malfunctioning. occurs.
本発明は、このような従来の塵芥処理方法における問題
を解決し、ポンプによる下水の送水を良好に行わしめう
る塵芥処理方法を一供すると共に、この方法を好適に実
施できる塵芥処理装置を提供することを目的とする。The present invention solves the problems in conventional garbage treatment methods, provides a garbage treatment method that can efficiently convey sewage using a pump, and provides a garbage treatment device that can suitably carry out this method. The purpose is to
(問題点を解決するための手段)
すなわち、本発明の塵芥処理方法は、ピットへの流入前
において下水中から分離除去した塵芥を、破砕した上で
ポンプ吐出側の送水管内に投入して、この送水管内へ圧
送されてくる下水でもってこれと共に圧送させるように
したものである。(Means for Solving the Problems) That is, in the garbage treatment method of the present invention, the garbage separated and removed from the sewage water before flowing into the pit is crushed and then thrown into the water pipe on the discharge side of the pump, The sewage that is pumped into this water pipe is also pumped together with the sewage water.
また1本発明の塵芥処理装置は、ピットへと連らなる下
水流入路に、下水中の塵芥を分離除去する除塵機を配設
し、下水をピット外へ送水するポンプ吐出側の送水管に
、第1開閉弁を備えたバイパス管を連通接続し、このバ
イパス管の接続箇所間における送水管部分に、第2及び
第3開閉弁と該両開閉弁間に位置せしめた各々開閉可能
な塵芥投入口及び排水口とを夫々設け、この塵芥投入口
と前記除塵機との間に、除塵機により下水中から分離除
去した塵芥を破砕した上で前記塵芥投入口から前記送水
管部分に供給する塵芥破砕供給機を配設したものである
。In addition, in the dust treatment device of the present invention, a dust remover for separating and removing dust from the sewage is installed in the sewage inflow path leading to the pit, and a dust remover for separating and removing dust from the sewage is installed in the water pipe on the discharge side of the pump that sends the sewage to the outside of the pit. , a bypass pipe equipped with a first on-off valve is connected in communication, and a second and third on-off valve and a garbage bag each of which can be opened and closed are placed in the water pipe section between the connecting points of the bypass pipe. An input port and a drainage port are provided respectively, and between the garbage input port and the dust remover, the garbage separated and removed from the sewage water by the dust remover is crushed and then supplied from the garbage input port to the water pipe section. It is equipped with a garbage crushing and feeding machine.
(作用)
かかる塵芥処理装置によれば、除塵機により塵芥を分離
除去された下水が、ピットに流入し、更にポンプにより
送水管内を圧送される。塵芥の分離除去量が所定量とな
った時点で、第1開閉弁を開放すると共に第2及び第3
開閉弁を閉塞すると、塵芥を分離除去された下水は、バ
イパス管を介して送水される。そして、この状態におい
て、塵芥投入口及び排水口を開放して第2及び第3開閉
弁で閉塞された送水管部分の下水を排水口から排水させ
た上で、排水口を゛再び閉塞しておくと、°除塵機で下
水中から分離除去された塵芥が、塵芥破砕供給機により
細かく破砕された上で前記塵芥投入口から前記送水管部
分内に供給される。かかる塵芥の供給が所定量となった
時点で、塵芥投入口を閉塞し、更に第1開閉弁を閉塞す
ると共に第2及び第3開閉弁を開放すると、前記送水路
部分に供給された塵芥は、該送水管部分に圧送されてく
る下水によってこれと共に送水管内を圧送されることに
なる。したがって、下水中に含まれる塵芥は、ピットに
流入せず且つポンプを通過することなく、細かく破砕さ
れた上で、下水と共に送水管内を圧送されることになる
。(Function) According to this garbage processing device, sewage from which garbage has been separated and removed by the dust remover flows into the pit, and is further forced into the water pipe by the pump. When the amount of separated and removed garbage reaches a predetermined amount, the first on-off valve is opened and the second and third on-off valves are opened.
When the on-off valve is closed, the sewage from which dust has been separated and removed is sent through the bypass pipe. In this state, the garbage input port and the drain port are opened, the sewage from the blocked water pipe section is drained from the drain port by the second and third on-off valves, and then the drain port is closed again. Then, the dust separated and removed from the sewage by the dust remover is finely crushed by the dust crushing and feeding machine, and then fed into the water pipe section from the dust inlet. When the amount of garbage supplied reaches a predetermined amount, the garbage inlet is closed, the first on-off valve is closed, and the second and third on-off valves are opened. The sewage that is pumped into the water pipe section will be pumped through the water pipe together with the sewage. Therefore, the dust contained in the sewage is finely crushed without flowing into the pit or passing through the pump, and is then pumped through the water pipe together with the sewage.
(実施例)
以下1本発明の塵芥処理方法及びその装置を第1図に示
す実施例に基づいて具体的に説明する。(Example) Hereinafter, the garbage processing method and apparatus thereof according to the present invention will be specifically explained based on the example shown in FIG.
まず、本発明の塵芥処理装置の構成について説明すると
、この実施例の塵芥処理装置は、ピット1に連らなる下
水流入路2の適所に除塵機3を配設し、ピッ)1内に設
置したポンプ4の吐出側の送水管5の適所に、第1開閉
弁6を備えたバイパス管7を連通接続し、このバイパス
管7の接続箇所間の送水管5部分たる塵芥投入管部5a
に、第2及び第3開閉弁8.9と両開閉弁8.8間に位
置せしめた各々開閉可能な塵芥投入口10及び排水口1
1を夫々設け、除塵機3と塵芥投入口!Oとの間に塵芥
破砕供給機12を配設してなる。First, to explain the configuration of the garbage treatment device of the present invention, the garbage treatment device of this embodiment has a dust remover 3 disposed at an appropriate location in the sewage inflow path 2 leading to the pit 1, and is installed in the pit 1. A bypass pipe 7 equipped with a first on-off valve 6 is connected to a suitable position of the water pipe 5 on the discharge side of the pump 4, and a garbage input pipe section 5a which is a portion of the water pipe 5 between the connection points of the bypass pipe 7 is connected.
, a garbage inlet 10 and a drain port 1, which can be opened and closed, respectively, are located between the second and third on-off valves 8.9 and both on-off valves 8.8.
1 is installed respectively, and a dust remover 3 and a garbage inlet are installed! A garbage crushing feeder 12 is disposed between the
除塵機3は、公知のものであるからその詳細は省略する
が、例えば、下水流入路2の底部から流入路2上へと傾
斜状に配設された固定スクリーン及び回動スクリーンで
もって下水13a中から塵遺14aを分離除去して、こ
れらスクリーンを通過桟は塵芥14aを除去された除塵
下水13bのみが下水流入路2からピット!へと流入せ
しめられるようになされており、除塵a3を稼動させる
ことにより、回動スクリーン及びセパレータ等でもって
塵芥14aを下水流入路2上へ取出して落下放出させる
ようになされている。The dust remover 3 is a well-known device, so the details thereof will be omitted. The dust 14a is separated and removed from the inside, and only the dust-free sewage 13b from which the dust 14a has been removed passes through these screens and enters the pit from the sewage inflow channel 2! By operating the dust remover a3, the dust 14a is taken out onto the sewage inflow path 2 using a rotating screen, a separator, etc., and is allowed to fall and be discharged.
塵芥投入口lOは、塵芥投入管部5aに上方に向けて連
通接続した第4開閉弁15付の管体からなり。The garbage inlet lO is composed of a pipe body with a fourth on-off valve 15 connected upward to the garbage inlet pipe portion 5a.
この管体の上端部には塵芥投入用のホッパー10が取付
けられている。A hopper 10 for throwing in garbage is attached to the upper end of this tube.
排水口11は、塵芥投入管部5aに下方向に向けて連通
接続した第5開閉弁!7付の管体からなる。The drain port 11 is a fifth on-off valve connected downward to the garbage input pipe portion 5a! It consists of a tube body with 7 attachments.
塵芥破砕供給機!2は、除塵41!3から落下放出され
る塵芥14aを細か〈破砕しうる公知の塵芥破砕機18
と、この塵芥破砕機18により破砕された破砕塵芥14
bを前記ホッパー18へと搬送するベルトコンベヤ等の
搬送機19とからなる。Dust crushing supply machine! 2 is a known garbage crusher 18 that can finely crush the garbage 14a falling and discharged from the dust remover 41!3.
The crushed garbage 14 crushed by this garbage crusher 18
b to the hopper 18, and a conveyor 19 such as a belt conveyor.
次に、上記塵芥処理装置を用いて本発明の塵芥処理方法
を具体的に説明する。Next, the garbage treatment method of the present invention will be specifically explained using the above-mentioned garbage treatment apparatus.
すなわち1通常時においては、第1.第4及び第5開閉
弁13,15.l?を閉塞させると共に第2及び第3開
閉弁8.9を開放させておく。In other words, during normal times, the 1st. Fourth and fifth on-off valves 13, 15. l? is closed, and the second and third on-off valves 8.9 are left open.
この訣態においては、下水流入路2を流れる下水13a
が除塵@3を通過することによって、下水13a中の塵
芥14aが分離除去されて、ビット1へは塵芥14aを
除去された除塵下水13bが流入せしめられることにな
り、この除塵下水13bは、ポンプ4により塵芥投入管
部5aを含む送水管5内を圧送せしめられていく。In this situation, the sewage 13a flowing through the sewage inflow channel 2
By passing through the dust removal @3, the dust 14a in the sewage 13a is separated and removed, and the dust 14a removed sewage 13b is allowed to flow into the bit 1, and this dust removal sewage 13b is pumped 4, the waste is forced to be fed through the water pipe 5 including the waste input pipe section 5a.
そして、塵芥14aの分離除去量が所定量となった時点
で、第1開閉弁Bを開放すると共に第2及び第3開閉弁
8,9を閉塞して、除塵下水13bを、塵芥投入管部5
aを通過させず、バイパス管7を通過させて送水させる
ようにする。When the amount of separated and removed garbage 14a reaches a predetermined amount, the first on-off valve B is opened and the second and third on-off valves 8 and 9 are closed, and the dust-removed sewage 13b is transferred to the garbage input pipe. 5
Water is sent through bypass pipe 7 without passing through a.
さらに、第4及び第5開閉弁15.17を開放して、塵
芥投入管部5a内の除塵下水14bを排水口11から排
水させた上、再び第5開閉弁17を閉塞すると共に、除
塵機3及び塵芥破砕供給機12を稼動させて、破砕塵芥
14bをホッパ18から塵芥−投入管部5a内に供給さ
せる。Furthermore, the fourth and fifth on-off valves 15.17 are opened to drain the dust-removed sewage 14b in the garbage input pipe section 5a from the drain port 11, and the fifth on-off valve 17 is closed again. 3 and the garbage crushing supply machine 12 are operated to supply the crushed garbage 14b from the hopper 18 into the garbage input pipe section 5a.
そして、塵芥投入管部5a内に所定量の破砕塵芥14b
が供給された時点で、除塵機3及び塵芥破砕供給機12
を停止させると共に、第4開閉弁15を閉塞させる。Then, a predetermined amount of crushed garbage 14b is placed in the garbage input pipe 5a.
When the dust removal machine 3 and the garbage crushing supply machine 12 are supplied,
is stopped, and the fourth on-off valve 15 is closed.
しかる後、第1開閉弁Bを閉塞すると共に第2及び第3
開閉弁8.9を開放して、塵芥投入管部5a内へ圧送さ
れてくる除塵下水13bでもって、塵芥投入管部5a内
の破砕塵芥14bをこの除塵下水13bと共に送水管5
内を圧送せしめるのである。After that, the first on-off valve B is closed and the second and third on-off valves are closed.
The on-off valve 8.9 is opened and the dust-removed sewage 13b is force-fed into the garbage input pipe section 5a, and the crushed waste 14b inside the garbage input pipe section 5a is transferred to the water pipe 5 together with the dust-removed sewage 13b.
This forces the inside to be pumped out.
なお、除塵413及び塵芥破砕供給機12は、その起動
、停止を人為的に操作するものであっても。Incidentally, the dust removal 413 and the garbage crushing and supplying machine 12 may be started and stopped manually.
自動的に制御しうるちのであってもよく、各開閉弁8,
8,9,15.17も、その開閉を人為的に行うもので
あっても、上記除塵機3及び塵芥破砕供給機12の起動
、停止に応じて自動制御されるものであってもよい、ま
た、塵芥投入管部5aは、ポンプ礁の吐出側であればそ
の位置は特に限定されないが。It may be automatically controlled, and each on-off valve 8,
8, 9, 15.17 may also be opened and closed manually, or may be automatically controlled in accordance with the startup and stop of the dust remover 3 and the garbage crushing and supplying machine 12. Moreover, the position of the garbage input pipe part 5a is not particularly limited as long as it is on the discharge side of the pump reef.
破砕塵芥14bの圧送作用上等からしてポンプ4の吐出
口に近い箇所に位置させておくことが望ましい。It is desirable to locate it near the discharge port of the pump 4 in view of the pumping effect of the crushed waste 14b.
さらに、142図に示す如く、ホッパー16の上端開口
部に、多数の噴出孔21a・・・を下方に向けて穿設し
た環状の洗滌管2!を取付けると共に、この洗滌管21
と塵芥投入管部5aよりポンプ吐出口寄りの送水管5部
分とを第6開閉弁22付の給水管23を介して連結して
、破砕塵芥14bのホッパー!Bへの投入完了後に、第
6開閉弁22鷺開放して除塵下水!3bを洗滌管21の
噴出孔21a−・・からホッパー18の内壁面に向けて
噴出させ、もってホッパーIBの内壁面に付着した破砕
塵芥14bを塵芥投入管部5a内に洗い落すようにして
もよい、このようにすれば。Furthermore, as shown in FIG. 142, an annular cleaning pipe 2 is provided at the upper end opening of the hopper 16 with a large number of jet holes 21a facing downward! At the same time as installing this cleaning pipe 21
A hopper for crushed waste 14b is created by connecting the part of the water supply pipe 5 closer to the pump outlet than the waste input pipe part 5a via the water supply pipe 23 with the sixth on-off valve 22. After completing the input to B, open the 6th on-off valve 22 to remove dust from the sewage! 3b is jetted toward the inner wall surface of the hopper 18 from the ejection holes 21a of the cleaning pipe 21, thereby washing the crushed debris 14b adhering to the inner wall surface of the hopper IB into the garbage input pipe portion 5a. Good, if you do it like this.
ホッパー16の内壁面に破砕塵芥14bが次々に付着し
てブリッジを形成して、ホッパー18から塵芥投入管部
5aへの破砕塵芥14bの供給が円滑且つ良好に行われ
ないといった不都合は、これを有効に防止できる。The inconvenience that the crushed debris 14b adheres one after another to the inner wall surface of the hopper 16 and forms a bridge, preventing the crushed debris 14b from being smoothly and well supplied from the hopper 18 to the garbage input pipe 5a, is caused by this. Can be effectively prevented.
(発明の効果)
本発明の塵芥処理方法によれば、下水中に含まれる塵芥
を細かく破砕させた上で送水管内を圧送させるから、送
水管内に塵芥が詰まったりすることがなく、シかもこの
塵芥を、ビット内に流入させずポンプを通過させないか
ら、ビット内にスカムが発生したり、ポンプが詰まった
りすることがなく、長期に亘って良好な送水機能を発揮
させうる。(Effects of the Invention) According to the garbage disposal method of the present invention, since the garbage contained in sewage is finely crushed and then pumped through the water pipes, the water pipes will not be clogged with garbage and there will be no problem. Since dust is not allowed to flow into the bit or pass through the pump, no scum is generated within the bit or the pump is clogged, and a good water supply function can be achieved over a long period of time.
さらに、下水中から除去した塵芥を貯蔵したり焼却炉や
埋立地等の他の場所へ運搬させたりする必要がないから
、これらのための設備やスペースを全く必要とせず、下
水中継ポンプ場の必要スペースを可及的に小さくできる
。しかも、塵芥の放つ悪臭による公害問題も生じない。Furthermore, since there is no need to store the waste removed from sewage or transport it to other locations such as incinerators or landfills, there is no need for any equipment or space for these purposes, and the wastewater relay pump station The required space can be made as small as possible. Furthermore, there is no problem of pollution caused by the foul odor emitted by the garbage.
また、本発明の塵芥処理装置によれば、かかる塵芥処理
方法を好適に実施することができる。Moreover, according to the garbage treatment device of the present invention, such a garbage treatment method can be suitably implemented.
第1図は本発明に係る塵芥処理装置の一実施例を示す概
略図であり、第2図は他の実施例を示す要部の概略図で
ある。
l・・・ピット
2・・・下水流入路
3・・・除塵機
4・・・ポンプ
5・・・送水管
5a・・・塵芥投入管部(送水管部分)6・・・第1開
閉弁
7・・・バイパス管
8・・・第2開閉弁
8・・・第3開閉弁
lO・・・塵芥投入口
11・・・排水口
12・・・塵芥破砕供給機
13a・・・下水
13b・・・除塵下水
14a・・・塵芥
14b・・・破砕塵芥
特許出願人 久保田鉄工株式会社代 理 人
弁理士 鈴江 孝−粥1図FIG. 1 is a schematic diagram showing one embodiment of a garbage processing apparatus according to the present invention, and FIG. 2 is a schematic diagram of main parts showing another embodiment. l...Pit 2...Sewage inlet channel 3...Dust remover 4...Pump 5...Water pipe 5a...Dust input pipe section (water pipe section) 6...First on-off valve 7... Bypass pipe 8... Second on-off valve 8... Third on-off valve lO... Garbage inlet 11... Drain port 12... Dust crushing feeder 13a... Sewer 13b... ...Dust removal sewage 14a...Garbage 14b...Shredding garbage Patent applicant: Kubota Iron Works Co., Ltd. Agent
Patent Attorney Takashi Suzue - Illustration 1 of Porridge
Claims (2)
へ送水させる場合において、ピットへの流入前において
下水中から分離除去した塵芥を、破砕した上でポンプ吐
出側の送水管内に投入して、この送水管内へ圧送されて
くる下水でもってこれと共に圧送させるようにすること
を特徴とする、下水中継ポンプ場における塵芥処理方法
。(1) When the sewage that has flowed into the pit is sent out of the pit by a pump, the garbage that has been separated and removed from the sewage before flowing into the pit is crushed and thrown into the water pipe on the discharge side of the pump, A garbage disposal method in a sewage relay pumping station, characterized in that the sewage that is pumped into the water pipe is pumped together with the sewage.
を分離除去する除塵機を配設し、下水をピット外へ送水
するポンプ吐出側の送水管に、第1開閉弁を備えたバイ
パス管を連通接続し、このバイパス管の接続箇所間にお
ける送水管部分に、第2及び第3開閉弁と該両開閉弁間
に位置せしめた各々開閉可能な塵芥投入口及び排水口と
を夫々設け、この塵芥投入口と前記除塵機との間に、除
塵機により下水中から分離除去した塵芥を破砕した上で
前記塵芥投入口から前記送水管部分に供給する塵芥破砕
供給機を配設してあることを特徴とする、下水中継ポン
プ場における塵芥処理装置。(2) A dust remover that separates and removes dust from the sewage is installed in the sewage inflow path leading to the pit, and a first on-off valve is installed in the water pipe on the pump discharge side that sends sewage out of the pit. A bypass pipe is connected for communication, and a second and third on-off valve and a garbage inlet and a waste outlet, which can be opened and closed, respectively, are provided in the water pipe portion between the connection points of the bypass pipe. A garbage crushing feeder is provided between the garbage inlet and the dust remover, which crushes the garbage separated and removed from the sewage by the dust remover, and supplies the crushed garbage from the garbage inlet to the water pipe section. A garbage treatment device at a sewage relay pumping station, characterized in that:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60098437A JPS61257250A (en) | 1985-05-09 | 1985-05-09 | Method and device for disposing garbage in sewage relay pumpstation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60098437A JPS61257250A (en) | 1985-05-09 | 1985-05-09 | Method and device for disposing garbage in sewage relay pumpstation |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61257250A true JPS61257250A (en) | 1986-11-14 |
JPS6328660B2 JPS6328660B2 (en) | 1988-06-09 |
Family
ID=14219761
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60098437A Granted JPS61257250A (en) | 1985-05-09 | 1985-05-09 | Method and device for disposing garbage in sewage relay pumpstation |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61257250A (en) |
-
1985
- 1985-05-09 JP JP60098437A patent/JPS61257250A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6328660B2 (en) | 1988-06-09 |
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