JPS6113112Y2 - - Google Patents
Info
- Publication number
- JPS6113112Y2 JPS6113112Y2 JP1978162950U JP16295078U JPS6113112Y2 JP S6113112 Y2 JPS6113112 Y2 JP S6113112Y2 JP 1978162950 U JP1978162950 U JP 1978162950U JP 16295078 U JP16295078 U JP 16295078U JP S6113112 Y2 JPS6113112 Y2 JP S6113112Y2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- tank
- flotation
- wastewater treatment
- aeration
- 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
Links
- 239000010802 sludge Substances 0.000 claims description 89
- 238000005273 aeration Methods 0.000 claims description 32
- 238000005188 flotation Methods 0.000 claims description 32
- 230000008719 thickening Effects 0.000 claims description 21
- 241000628997 Flos Species 0.000 claims description 18
- 238000004065 wastewater treatment Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 6
- 230000007723 transport mechanism Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000002351 wastewater Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 8
- 230000007423 decrease Effects 0.000 description 4
- 238000005192 partition Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012851 eutrophication Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
- Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Activated Sludge Processes (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Physical Water Treatments (AREA)
- Removal Of Floating Material (AREA)
Description
【考案の詳細な説明】
本考案は、し尿、下水など、BOD成分、窒素
化合物、リン酸（以下NH4、PO4と略する）を含
有する有機性廃水を生物学的に処理するための廃
水処理装置に関するものである。[Detailed description of the invention] This invention is a method for biologically treating organic wastewater, such as human waste and sewage, containing BOD components, nitrogen compounds, and phosphoric acid (hereinafter abbreviated as NH 4 and PO 4 ). This relates to wastewater treatment equipment.
一般に有機性廃水の処理対象はこれまでBOD
成分のみであつたが、今日水系の富栄養化の主要
因子としてNH4、PO4の除去を要求されるにいた
つているが、これらの除去にはそれぞれ従来の活
性汚泥処理装置に新たに多くの生物的、物理的処
理装置を付設しなければならず、またそれらの運
転経費も多大となるため実施が困難であり、ほと
んどの廃水のNH4、PO4は従来の活性汚泥処理に
よつて未処理のまま又は不完全なまま放流されて
いる。 In general, organic wastewater has traditionally been treated using BOD.
However, today there is a demand for the removal of NH 4 and PO 4 as the main factors contributing to the eutrophication of water systems, and in order to remove these, many new additions are required to the conventional activated sludge treatment equipment. This is difficult to implement because it requires the installation of biological and physical treatment equipment, and the operating costs thereof are large. It is released untreated or incompletely.
そしてこのNH4は富栄養化の因子であるばかり
でなく、従来の活性汚泥処理においてトラブルの
原因となつている。NH4を含有する廃水の活性汚
泥処理では汚泥中に生息する硝化菌によつて、
NH4はNO2及び／又はNO3（以下NOxと略する）
に硝化され、沈殿槽で脱窒素現象を生じ、スカム
を生成するため活性汚泥処理装置の運転が不可能
となる上、処理水中の浮遊固形物（SS）が増加
し、処理水質が悪化する。またPO4は活性汚泥処
理では充分除去できず、わずかに活性汚泥が生成
されたときに菌体成分となつて廃水から除去され
る（例えば、し尿処理では流入PO4の20〜30％程
度）にすぎない。また活性汚泥沈殿槽では高濃度
の返送汚泥を確保するため一定量の汚泥を沈積し
圧密しているが、汚泥の沈積部は嫌気条件にあ
り、汚泥中のPO4を吐出してしまうため処理水
PO4濃度が上昇する。一方汚泥沈積量が減少すれ
ば、吐出量は少なくなるが、汚泥が圧密されず、
返送汚泥濃度が低下し、充分量の汚泥を曝気槽に
返送できなくなるなど従来の活性汚泥処理装置に
は多くの宿命的な欠点がある。これらの欠点を有
する沈殿法に対し、有効な固液分離法として浮上
分離法があるが、浮上分離法では分離汚泥に空気
が含有されているため汚泥の嫌気化が防止される
ので分離水中へのPO4の吐出がなくなり、また脱
窒素現象による汚泥浮上という問題も解消され
る。しかしながら、従来の浮上分離法において浮
上汚泥（フロス）の移送は、撹拌装置付の槽を用
いてフロスに多量に含有されている気泡を除去し
たのち、ポンプによつて行なわれているためポン
プ並びに脱気装置を必要とし、設備的にも運転経
費も割り高となるし、装置およびその運転ともに
煩雑となる問題点があつた。 This NH4 is not only a factor in eutrophication, but also a cause of trouble in conventional activated sludge treatment. In activated sludge treatment of wastewater containing NH4 , the nitrifying bacteria living in the sludge
NH4 is NO2 and/or NO3 (hereafter abbreviated as NOx)
The PO4 is nitrified in the sedimentation tank, causing denitrification and generating scum, which makes it impossible to operate the activated sludge treatment equipment, and the suspended solids (SS) in the treated water increase, deteriorating the quality of the treated water. PO4 cannot be sufficiently removed by activated sludge treatment, and is only removed from the wastewater as a bacterial component when a small amount of activated sludge is generated (for example, in sewage treatment, only about 20-30% of the inflow PO4 ). In the activated sludge sedimentation tank, a certain amount of sludge is deposited and compacted to ensure a high concentration of returned sludge, but the part where the sludge is deposited is in anaerobic conditions, and the PO4 in the sludge is discharged, resulting in a decrease in the amount of PO4 in the treated water.
The PO4 concentration increases. On the other hand, if the amount of sludge deposition decreases, the discharge amount decreases, but the sludge is not consolidated,
Conventional activated sludge treatment equipment has many fatal defects, such as a decrease in the concentration of returned sludge and an inability to return a sufficient amount of sludge to the aeration tank. In contrast to the sedimentation method, which has these defects, there is a flotation method that is effective as a solid-liquid separation method. In the flotation method, air is contained in the separated sludge, so anaerobic sludge is prevented, and PO4 is not discharged into the separated water, and the problem of sludge floating due to denitrification is also solved. However, in the conventional flotation method, the floating sludge (froth) is transported by a pump after removing the air bubbles contained in the froth in a large amount using a tank equipped with an agitator, so a pump and a deaeration device are required, which results in high equipment and operating costs, and the equipment and operation are complicated.
本考案は、これら従来の諸欠点を除去し、従来
必要とされていた移送ポンプおよび移送の前処理
設備としての脱気装置を省略し、より簡単な設備
によつて、浮上汚泥を活性汚泥曝気槽に返送して
効率よく廃水を処理する装置を経済的に提供する
ことを目的とするものである。 The present invention eliminates these conventional drawbacks, omits the conventionally required transfer pump and deaerator as pre-treatment equipment for transfer, and uses simpler equipment to convert floated sludge into activated sludge aeration. The purpose of this invention is to economically provide an apparatus for efficiently treating wastewater by returning it to a tank.
本考案は、活性汚泥曝気槽と汚泥浮上濃縮槽と
を備えた廃水処理装置において、前記活性汚泥曝
気槽に密接して汚泥浮上濃縮槽を設け、この密接
する両槽の上端部の一部を直接結合し浮上濃縮槽
のフロスが曝気槽に直接移送されるようになつて
いる廃水処理装置である。 The present invention provides a wastewater treatment system equipped with an activated sludge aeration tank and a sludge flotation thickening tank, in which a sludge flotation thickening tank is provided in close proximity to the activated sludge aeration tank, and a part of the upper ends of both tanks are provided in close proximity to the activated sludge aeration tank. This is a wastewater treatment device that is directly connected to the flotation tank so that the floss from the flotation tank is directly transferred to the aeration tank.
図示のものにおいて、廃水流入部１を備えた活
性汚泥曝気槽２に隔壁１３を介して汚泥浮上濃縮
槽４を設けてこの密接する両槽の上端部の一部を
前記汚泥浮上濃縮槽４のフロス７が曝気槽２に直
接移送されるように結合してある。この直接結合
した部分にフロス掻寄機８若しくはフロス掻取機
などの搬入機構を配備し、フロス７を直接移送す
るのに便ならしめてあるが、浮上濃縮槽４に設け
られるエアリフトポンプを利用し、第４図に示す
ように浮上汚泥をオーバーフローさせて曝気槽２
に直接落下誘導する構成とすることもできる。な
お、第４図において１７はエアリフト管、１８は
送気管、１９はブロワーである。 In the illustrated example, a sludge flotation and concentration tank 4 is provided in an activated sludge aeration tank 2 equipped with a wastewater inlet 1 via a partition wall 13, and a part of the upper end of the two tanks that are in close contact with each other is connected to the sludge flotation and concentration tank 4. The floss 7 is connected to be transferred directly to the aeration tank 2. A transport mechanism such as a floss scraper 8 or a floss scraper is provided at this directly connected part to facilitate direct transfer of the floss 7, but an air lift pump installed in the flotation concentration tank 4 may be used. As shown in Figure 4, the floating sludge is overflowed into the aeration tank 2.
It is also possible to have a configuration in which the fall is guided directly to the object. In addition, in FIG. 4, 17 is an air lift pipe, 18 is an air supply pipe, and 19 is a blower.
また前記汚泥浮上濃縮槽４はその一端の一部を
余剰汚泥貯留槽１０の流入口の一部にし、この余
剰汚泥貯留槽１０を介して曝気槽２と連接した一
部とすることもでき、この場合余剰汚泥貯留槽１
０の汚泥流入口１１に可動式の余剰汚泥流量調整
板１２を附設することもできる。さらに汚泥浮上
濃縮槽４には加圧水供給配管３を連結した活性汚
泥混合液配管９が曝気槽２と連絡して設けられ、
該曝気槽２からの混合液を汚泥浮上濃縮槽４内に
導入されるようになつている。さらに汚泥浮上濃
縮槽４内は区画壁１４，１５を適宜配設し、フロ
ス７とは分けて分離液５として処理水集水溝１６
を介して処理水流出部６へ誘導し槽外に流出する
ようにしてある。 Further, the sludge flotation thickening tank 4 can have a part of one end thereof as a part of the inlet of the surplus sludge storage tank 10, and can be connected to the aeration tank 2 via the surplus sludge storage tank 10. In this case, surplus sludge storage tank 1
A movable excess sludge flow rate adjusting plate 12 may also be attached to the sludge inlet 11 of 0. Further, the sludge flotation thickening tank 4 is provided with an activated sludge mixed liquid pipe 9 connected to the pressurized water supply pipe 3 in communication with the aeration tank 2.
The mixed liquid from the aeration tank 2 is introduced into the sludge flotation and concentration tank 4. Furthermore, partition walls 14 and 15 are appropriately arranged inside the sludge flotation thickening tank 4, and a treated water collection groove 16 is used as a separated liquid 5 separate from the floss 7.
The treated water is guided to the outflow part 6 through the tank and flows out of the tank.
しかして廃水は廃水流入部１から活性汚泥曝気
槽２に流入し、好気的条件の下に、BOD，COD
成分などの汚濁物質が除去されたのち、加圧水供
給配管３からの加圧水と混合され、曝気槽２と密
接する汚泥浮上濃縮槽４に混合液配管９で流入
し、汚泥は浮上分離され、分離液５は処理水とし
て処理水流出部６から槽外に流出する。フロス
（浮上汚泥）７はフロス掻寄機８あるいはフロス
掻取機によつて汚泥浮上濃縮槽４から活性汚泥曝
気槽２に直接返送され、一部は余剰汚泥として余
剰汚泥貯留槽１０に移送される。この余剰汚泥流
入口１１は汚泥移送量を調節できる可動式の調整
板１２が設けられていれば、廃水処理装置からの
排泥量がこれによつて容易に調整される。 Therefore, the wastewater flows into the activated sludge aeration tank 2 from the wastewater inflow part 1, and under aerobic conditions, BOD, COD
After pollutants such as components are removed, the sludge is mixed with pressurized water from the pressurized water supply pipe 3 and flows into the sludge flotation thickening tank 4 which is in close contact with the aeration tank 2 through the mixed liquid pipe 9. The sludge is floated and separated, and the separated liquid is 5 flows out of the tank from a treated water outlet 6 as treated water. Floss (floated sludge) 7 is directly returned from the sludge flotation thickening tank 4 to the activated sludge aeration tank 2 by a froth scraper 8 or a froth scraper, and a portion is transferred to the surplus sludge storage tank 10 as surplus sludge. Ru. If this excess sludge inlet 11 is provided with a movable adjustment plate 12 that can adjust the amount of sludge transferred, the amount of sludge discharged from the wastewater treatment device can be easily adjusted.
なお前記曝気槽２の後段に汚泥浮上濃縮槽４を
密着して設け、フロス（浮上汚泥）を直接曝気槽
に返送（第１返送）すると共に、フロスを曝気槽
混合液の乱流によつて破壊、脱気し、かつ混合液
で希釈し、さらに前記曝気槽の前段に嫌気槽を必
要に応じ設け、脱気、希釈されたフロスを嫌気槽
に返送（第２返送）して嫌気的条件で廃水に接触
処理するように構成することもできる。 A sludge flotation thickening tank 4 is provided in close contact with the aeration tank 2, and the floss (floated sludge) is directly returned to the aeration tank (first return), and the floss is transported by the turbulent flow of the aeration tank mixture. The floss is destroyed, deaerated, and diluted with a mixed solution, and an anaerobic tank is provided as necessary before the aeration tank, and the deaerated and diluted floss is returned to the anaerobic tank (second return) to maintain anaerobic conditions. It can also be configured to contact wastewater for treatment.
本案は活性汚泥曝気槽と汚泥浮上濃縮槽とを備
えた廃水処理装置において、前記活性汚泥曝気槽
に密接して汚泥浮上濃縮槽を設け、この密接する
両槽の上端部の一部を直接結合し浮上濃縮槽のフ
ロスが曝気槽に直接移送されるようになつている
廃水処理装置としてあるので活性汚泥曝気槽と汚
泥浮上濃縮槽を一体化することとなり、曝気槽混
合液の乱流をフロスの破壊、脱気に利用すること
ができ、従来の脱気槽、濃密な脱気汚泥を移送す
るポンプを省略することができ、廃水処理装置お
よびその運転も簡略化され、その実用的価値は大
なるものである。また処理水としての水質をも大
巾に高められ経済的なコストで安定した処理を容
易に可能とすることの効果がある。 This proposal is a wastewater treatment system equipped with an activated sludge aeration tank and a sludge flotation thickening tank, in which a sludge flotation thickening tank is provided in close proximity to the activated sludge aeration tank, and parts of the upper ends of both tanks are directly connected. Since this is a wastewater treatment device in which the floss from the flotation thickener is directly transferred to the aeration tank, the activated sludge aeration tank and the sludge flotation thickener are integrated, and the turbulent flow of the aeration tank mixture is transferred to the floss. The conventional deaeration tank and the pump to transfer the dense deaeration sludge can be omitted, and the wastewater treatment equipment and its operation are also simplified, and its practical value is It is a big thing. Furthermore, the quality of treated water can be greatly improved, and stable treatment can be easily performed at an economical cost.
図面は本考案の実施例を示し、第１図は縦断面
図、第２図は平面図、第３図は他の実施例の一部
拡大平面図、第４図はさらに別の実施例の縦断面
図である。
１……廃水流入部、２……活性汚泥曝気槽、３
……加圧水供給配管、４……汚泥浮上濃縮槽、５
……分離液、６……処理水流出部、７……フロ
ス、８……フロス掻寄機、９……活性汚泥混合液
配管、１０……余剰汚泥貯留槽、１１……余剰汚
泥流入口、１２……余剰汚泥流量調整板、１３…
…隔壁、１４，１５……区画壁、１６……処理水
素水溝、１７……エアリフト管、１８……送気
管、１９……ブロワー。
The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal cross-sectional view, FIG. 2 is a plan view, FIG. 3 is a partially enlarged plan view of another embodiment, and FIG. 4 is a still further embodiment. FIG. 1...Wastewater inflow section, 2...Activated sludge aeration tank, 3
... Pressurized water supply piping, 4 ... Sludge flotation thickening tank, 5
... Separated liquid, 6 ... Treated water outflow section, 7 ... Floss, 8 ... Floss scraper, 9 ... Activated sludge mixed liquid piping, 10 ... Surplus sludge storage tank, 11 ... Surplus sludge inlet , 12... Surplus sludge flow rate adjustment plate, 13...
...Partition wall, 14, 15...Dividing wall, 16...Processing hydrogen water groove, 17...Air lift pipe, 18...Air supply pipe, 19...Blower.
Claims (1)
とで行なわれるように活性汚泥曝気槽と汚泥浮
上濃縮槽とを備えた廃水処理装置において、前
記活性汚泥曝気槽に密接して汚泥浮上濃縮槽を
設け、この密接する両槽の上端部の一部を直接
結合し浮上濃縮槽のフロスが曝気槽に直接移送
されるようになつている廃水処理装置。 ２ 前記汚泥浮上濃縮槽が、その上端の一部を余
剰汚泥貯留槽の流入口の一部としている実用新
案登録請求の範囲第１項記載の廃水処理装置。 ３ 前記汚泥浮上濃縮槽が、槽内で得られるフロ
ス（浮上汚泥）を活性汚泥曝気槽、余剰汚泥貯
留槽に直接移送する搬入機構を備えているもの
である実用新案登録請求の範囲第１項又は第２
項記載の廃水処理装置。 ４ 前記汚泥浮上濃縮槽が、余剰汚泥貯留槽を備
えたものであつて、該余剰汚泥貯留槽の汚泥流
入口に可動式の余剰汚泥流量調整板を付設して
いるものである実用新案登録請求の範囲第２項
又は第３項記載の廃水処理装置。 ５ 前記汚泥浮上濃縮槽が、フロス搬入機構を備
えたものであつて、該搬入機構がフロス掻寄機
あるいは掻取機である実用新案登録請求の範囲
第３項又は第４項記載の廃水処理装置。 ６ 前記汚泥浮上濃縮槽が、曝気槽の後段に設け
られるものであつて、エアリフトポンプを備え
ているものである実用新案登録請求の範囲第３
項、第４項又は第５項記載の廃水処理装置。[Scope of Claim for Utility Model Registration] 1. In a wastewater treatment device equipped with an activated sludge aeration tank and a sludge flotation thickening tank so that the activated sludge aeration process is carried out in the aeration tank and the sludge flotation thickening tank, the activated sludge aeration tank A wastewater treatment system in which a sludge flotation and thickening tank is provided in close proximity to the sludge flotation and thickening tank, and a portion of the upper end of the two tanks that are in close contact with each other are directly connected so that the floss from the flotation and thickening tank is directly transferred to the aeration tank. 2. The wastewater treatment apparatus according to claim 1, wherein the sludge flotation thickening tank has a part of its upper end as part of the inlet of the surplus sludge storage tank. 3. Scope of Utility Model Registration Claim 1, wherein the sludge flotation thickening tank is equipped with a transport mechanism that directly transfers the froth (floated sludge) obtained in the tank to an activated sludge aeration tank and a surplus sludge storage tank. or second
Wastewater treatment equipment as described in section. 4. A request for utility model registration in which the sludge flotation thickening tank is equipped with a surplus sludge storage tank, and a movable surplus sludge flow rate adjusting plate is attached to the sludge inlet of the surplus sludge storage tank. The wastewater treatment device according to item 2 or 3. 5. The wastewater treatment according to claim 3 or 4, wherein the sludge flotation thickening tank is equipped with a floss transport mechanism, and the transport mechanism is a floss scraper or scraper. Device. 6 Claim No. 3 for Utility Model Registration, in which the sludge flotation thickening tank is provided after the aeration tank and is equipped with an air lift pump.
5. The wastewater treatment device according to item 4, item 5, or item 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978162950U JPS6113112Y2 (en) | 1978-11-27 | 1978-11-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978162950U JPS6113112Y2 (en) | 1978-11-27 | 1978-11-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5580098U JPS5580098U (en) | 1980-06-02 |
| JPS6113112Y2 true JPS6113112Y2 (en) | 1986-04-23 |
Family
ID=29159156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1978162950U Expired JPS6113112Y2 (en) | 1978-11-27 | 1978-11-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6113112Y2 (en) |
-
1978
- 1978-11-27 JP JP1978162950U patent/JPS6113112Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5580098U (en) | 1980-06-02 |
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