JPS6067134A - Lining method of rubber on inner surface of piping - Google Patents

Lining method of rubber on inner surface of piping

Info

Publication number
JPS6067134A
JPS6067134A JP58176249A JP17624983A JPS6067134A JP S6067134 A JPS6067134 A JP S6067134A JP 58176249 A JP58176249 A JP 58176249A JP 17624983 A JP17624983 A JP 17624983A JP S6067134 A JPS6067134 A JP S6067134A
Authority
JP
Japan
Prior art keywords
rubber lining
piping
pipe
rubber
adapter
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
Application number
JP58176249A
Other languages
Japanese (ja)
Inventor
Koichiro Kobayashi
小林　浩一郎
Kazuaki Katsuta
勝田　和明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP58176249A priority Critical patent/JPS6067134A/en
Publication of JPS6067134A publication Critical patent/JPS6067134A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/18—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using tubular layers or sheathings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/22—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using layers or sheathings having a shape adapted to the shape of the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/26—Lining or sheathing of internal surfaces
    • B29C63/34—Lining or sheathing of internal surfaces using tubular layers or sheathings
    • B29C63/346—Fixing the end of the lining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • B29C66/1162—Single bevel to bevel joints, e.g. mitre joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material

Abstract

PURPOSE:To form a rubber lining of uniform thickness efficiently in a short time by a method wherein a rubber lining material is inserted into and pressure-bonded on the inner surface of a piping in the installed state, and then a rubber lining adaptor is inserted and pressure-bonded thereon. CONSTITUTION:A bonding agent is applied on the inner surface of a piping 1 in the installed state, and then a rubber lining material 2 is inserted into the piping 1 from the direction of an arrow 6 and fitted therein. Next, closing members 3 and 4 are fitted on the opposite ends of the piping 1 with flanges 1a provided on said ends, and a pressure fluid is charged in the piping from a pressure pipe 3a so as to fit the rubber lining material 2 on the inner surface of the piping 1 by pressure-bonding. Then, a rubber lining adaptor 5 is pressure-bonded on the remaining part of the inner surface of the piping 1 by the same operation so that the inner peripheral surface of the joining part of the rubber lining material 2 and the rubber lining adaptor 5 are formed to be flush with each other. Thereby a rubber lining of uniform thickness is formed through the full length of the inner surface of the piping 1.

Description

【発明の詳細な説明】 本発明は、原子力や火力発電所等の海水が流通する配管
の腐食防止のための配管内面へのゴムライニングの施工
方法の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for applying rubber lining to the inner surface of piping to prevent corrosion of piping through which seawater flows in nuclear power plants, thermal power plants, etc.

原子力や火力発電所等の海水が通る配管には、腐食防止
のため、その内面にゴムライニングが施されているが、
従来の配管内面へのゴムライニングは、ゴムライニング
メーカの工場にお見・て施工されている。そして該配管
の据伺後、何等かの原因でゴムライニングの剥離等の不
具合が発生した場合には、該配管をゴムライニングメー
力工場に持帰り、該工場のゴムライニング施工設備によ
って補修しているのが一般的である。そのため、従来は
補修配管の現場復旧の据付作業に多くの手間を要するば
かりでなく、埋設配管や原子炉格納容器の配管貫通部の
配管等のように、取はすしの困難な個所の配管等の場合
には、ゴムライニングの補修を行なうことができないと
いう問題点があった。Pipes through which seawater passes through nuclear and thermal power plants are lined with rubber on the inside to prevent corrosion.
Conventional rubber lining on the inner surface of pipes is installed at the rubber lining manufacturer's factory. If a problem such as peeling of the rubber lining occurs for some reason after the pipe is inspected, the pipe is taken back to the rubber lining factory and repaired using the factory's rubber lining construction equipment. It is common for there to be. Therefore, in the past, not only did it take a lot of time to install repaired piping for on-site restoration, but also piping was difficult to remove, such as buried piping or piping at the piping penetration of the reactor containment vessel. In this case, there was a problem in that the rubber lining could not be repaired.

本発明は、上記従来の問題点を解決し、配管内面のゴム
ライニングの補修期間を短縮でき、また。The present invention solves the above-mentioned conventional problems and can shorten the repair period for the rubber lining on the inner surface of the pipe.

取はずし困難な配管の場合には、配管据付現場にて、ゴ
ムライニングの補１鯵を行なうことの可能な配管内面へ
のゴムライニング施工方法を提供することを目的として
提案されたもので、据付状態にある配管の内面に、ゴム
ライニングを装着するに当り、ゴムライニング材とゴム
ライニングアダプターを用い、まず、ゴムライニング材
を加圧下において、上記配管の内面の一部に圧着したの
ち、ゴムライニングアダプターを、同じく加圧下におい
て、該配管の内面の残部に、上記ゴムライニング月とゴ
ムライニングアダプターの接合部の内周面が面一となる
ように圧着することにより、配管の内面の全長に亘り、
均一な厚さのゴムライニングを形成することを特徴とす
る配管内面へのゴムライニング施工方法に係るものであ
る。In the case of piping that is difficult to remove, this method was proposed with the aim of providing a method of constructing rubber lining on the inner surface of the piping, making it possible to supplement the rubber lining at the piping installation site. To attach the rubber lining to the inner surface of the piping, first use the rubber lining material and a rubber lining adapter to press the rubber lining material under pressure to a part of the inner surface of the piping, and then attach the rubber lining to the inner surface of the piping. The adapter is crimped to the rest of the inner surface of the piping under pressure so that the inner circumferential surfaces of the joint between the rubber lining and the rubber lining adapter are flush with each other, thereby extending the entire length of the inner surface of the piping. ,
The present invention relates to a method of applying rubber lining to the inner surface of a pipe, which is characterized by forming a rubber lining of uniform thickness.

以下、添イづ図面を参照しながら、本発明方法につき具
体的に説明する。Hereinafter, the method of the present invention will be specifically explained with reference to the accompanying drawings.

第１図＋Ａ）において、１は両端に連結用フランジ１ａ
をもつ補修を要する据伺状態にある配管、２は該配管１
の内径にほぼ等しく、配管１内に挿入可能で、一端にフ
ランジ２ａをもつ適当な厚さに形成されたゴムライニン
グ材で、同コ゛ムライニング月２の全長１１は、図示の
如く配管１の長さＬよりも適宜の長さだけ短か（形成さ
れている。また、該配管１の先端（フランジ２ａの反対
側）は、図示のようにナイフェツジ形状部２ｚに形成さ
れて℃・る。第１図（Ｂ）において、５は配管１内に挿
入可能で、該配管１の内径にほぼ等しい外径をもち。In Fig. 1+A), 1 has connecting flanges 1a on both ends.
2 indicates the piping 1 which is in a state of suspension requiring repair.
The rubber lining material is approximately equal to the inner diameter of the comb lining and has a suitable thickness that can be inserted into the pipe 1 and has a flange 2a at one end. The tip of the pipe 1 (on the opposite side of the flange 2a) is formed into a knife-shaped portion 2z as shown in the figure. In FIG. 1(B), 5 can be inserted into the pipe 1 and has an outer diameter approximately equal to the inner diameter of the pipe 1.

後端部にフランジ５αを有し、かつ上記ゴムライニング
材２と同一な厚さをもつとともに、先端部に上記ゴムラ
イニング材２のナイフェツジ形状部２ｈと第６図に示す
ように互いに重合して、内周面が面一となるナイフェツ
ジ形状部５ｈが形成されているゴム２イニングアダプタ
ーで、同ゴムライニングアダプター５の長さ１２は、該
ゴムライニングアダプター５が、配管１内に第３図に示
すように挿入されて、各先端部のナイフェツジ形状部２
Ａ　、５ｂが重ね合わされ、加圧管（たとえば圧力空気
導入管）３ａをもつ一力の閉鎖部材６と。It has a flange 5α at the rear end, has the same thickness as the rubber lining material 2, and has a knife-shaped portion 2h of the rubber lining material 2 at the tip end, which overlaps with the knife-shaped portion 2h of the rubber lining material 2, as shown in FIG. , is a rubber two-lining adapter in which a knife-shaped portion 5h whose inner circumferential surface is flush is formed, and the length 12 of the rubber lining adapter 5 is such that the rubber lining adapter 5 is installed inside the pipe 1 as shown in FIG. Inserted as shown, the knife shape part 2 of each tip
A, 5b are superimposed and a one-force closure member 6 has a pressurizing tube (for example, a pressurized air introduction tube) 3a.

他方の閉鎖部材４を介して、配管１内にゴムライニング
拐２とともに装着されたとき、ゴムライニング拐２の長
さ１１とゴムライニングアダプター５の長さ１２との和
は、上記両閉鎖部拐６，４間の間隔Ｓと等しくなくよう
になっている。When installed together with the rubber lining 2 in the pipe 1 via the other closing member 4, the sum of the length 11 of the rubber lining 2 and the length 12 of the rubber lining adapter 5 is equal to the length 12 of the rubber lining adapter 5. The interval S between 6 and 4 is unequal.

いま、据付状態にある配管１の内面のゴムライニングの
補滲を行なうに当っては、まず該配管の内面に接着剤を
塗布したのち、第１図（Ｎの矢印乙の方向（配管１内の
流体の流れの反対方向）からゴムライニング月２を挿入
して、該配管１内に装着する。ついで、第１図（Ａ）に
示す如く配管１の両端に閉鎖部材３，４を配管１の両端
のフランジ１αを介して取イ」けたのち、閉鎖部材６の
加圧管６ａから加圧流体たとえば圧力空気を導入して、
ゴムライニング材２を配管１の内面に圧着し、その加圧
状態を一定時間保持することにより、ゴムライニング月
２を配管１の内面に均一かつ確実に接着する。ついで、
閉鎖部材４を取りはずしたのち、ゴムライニング月２の
接着されていない配管１の内面及びコ゛ムライニング材
２のナイフェツジ形状部２ｈに接着剤を塗布し、ゴムラ
イニングアダプター５を第２図に示すように、配管１内
に挿入し、閉鎖部材４を配管１のフシフジ１ａＫ取付は
固定して、該ゴムライニングアダプター５の先楡のナイ
フエソ・ジ１区」會翔（シ　イム号イニング旧９の先端
のナイフェツジ形状部２ｈを重ね合せ、第６図に示すよ
うに、ゴムライニング材２とゴムライニングアダプター
５を、それら先端部のナイフェツジ形状部２１４．５ａ
を介して、その重合部の内側周面が面一となるように、
両部拐２，５を一体的に接合する。ついで閉鎖部材６の
加圧管６ａを介して圧力流体を内部に導入することによ
って。When refilling the rubber lining on the inner surface of the pipe 1 that is currently installed, first apply adhesive to the inner surface of the pipe, and then The rubber lining 2 is inserted into the pipe 1 from the opposite direction of the fluid flow (in the opposite direction of the fluid flow) and installed into the pipe 1. Then, as shown in FIG. is removed through the flanges 1α at both ends, and then a pressurized fluid such as pressurized air is introduced from the pressurizing pipe 6a of the closing member 6,
By press-fitting the rubber lining material 2 to the inner surface of the pipe 1 and maintaining the pressurized state for a certain period of time, the rubber lining material 2 is uniformly and reliably bonded to the inner surface of the pipe 1. Then,
After removing the closing member 4, adhesive is applied to the inner surface of the pipe 1 to which the rubber lining member 2 is not bonded and to the knife-shaped portion 2h of the comb lining material 2, and the rubber lining adapter 5 is attached as shown in FIG. , insert the closing member 4 into the pipe 1, fix the closing member 4 on the pipe 1, and then insert the rubber lining adapter 5 into the tip of the tip of the tip of the rubber lining adapter 5. The knife-shaped parts 2h are overlapped, and as shown in FIG.
so that the inner circumferential surface of the overlapping part is flush with the
Both parts 2 and 5 are integrally joined. By then introducing pressure fluid into the interior via the pressure tube 6a of the closure member 6.

ゴムライニング材２及びゴムライニングアダプター５を
配管１の内面側へ均一に加圧して、それら部材２，５を
配管１の内面に圧着し、配管１の内面全体へのゴムライ
ニングの施工ｈ′−完了する。The rubber lining material 2 and the rubber lining adapter 5 are uniformly pressurized to the inner surface of the pipe 1, and these members 2 and 5 are crimped to the inner surface of the pipe 1, and the rubber lining is applied to the entire inner surface of the pipe 1 h'- Complete.

以上要するに本発明は、据伺状暢にある配管の内面に、
ゴムライニングを装着するに当り、ゴムライニング材と
ゴムライニングアダプターを用い、まず、ゴムライニン
グ拐を加圧下において、上記配管の内面の一部に圧着し
たのち、コ゛ムライニングアダプターを、同じく加圧下
において、該配管の内面の残部に、上記ゴムライニング
材とゴムライニングアダプターの接合部の内周面が面一
となるように圧着することにより、配管の内面の全長に
亘り、均一な厚さのイムライニングを形成することを特
徴とする配管内面へのゴムライニング施工方法を要旨と
するものであるから、本発明によれば、 （１）配管を取りはずすことなく、据伺状態のまま、ゴ
ムライニングの補修を行なうことができる。In summary, the present invention provides the following advantages:
To install the rubber lining, first, using the rubber lining material and the rubber lining adapter, first press the rubber lining material under pressure to a part of the inner surface of the piping, then attach the comb lining adapter, also under pressure. By crimping the remaining inner surface of the pipe so that the inner peripheral surface of the joint between the rubber lining material and the rubber lining adapter is flush, an im-lining with a uniform thickness is created over the entire length of the inner surface of the pipe. According to the present invention, (1) the rubber lining can be repaired while the pipe is in its original condition without removing the pipe; can be done.

（２）従って、従来方式のように多の手間を要すること
なく、短期間のうちに、配管内面のゴムライニングの補
修が可能となるなどの実用的効果を挙げることができる
。(2) Therefore, it is possible to achieve practical effects such as being able to repair the rubber lining on the inner surface of the pipe in a short period of time without requiring much effort as in the conventional method.

【図面の簡単な説明】[Brief explanation of drawings]

添伺図面は、本発明方法の概略説明図で、第１図（Ａ）
は、ゴムライニング拐の配管内への装着状態の説明図、
第１図（Ｂ）は、コ゛ムライニングアダプターの縦断面
図、第２図は配管の内面全体にゴムライニングを装着し
た状態の説明図、第ろ図は第２図のＡ部拡大図である。 １：配管　２：ゴムライニング拐 ろ、４：閉鎖部材　６α：加圧管（加圧手段）５：ゴム
ライニングアダプター Ｌ：配管の長さ ｌ　ｔ　’、　ｗ’ムライニング材２の長さ−１２：：
ｊ′ムライニングアダプター５の長さＳ：閉鎖部材６，
４間の間隔 （外２名）The accompanying drawing is a schematic explanatory diagram of the method of the present invention, and is shown in Figure 1 (A).
is an explanatory diagram of the state in which the rubber lining is installed inside the pipe,
FIG. 1(B) is a longitudinal cross-sectional view of the comb lining adapter, FIG. 2 is an explanatory view of a state in which the rubber lining is attached to the entire inner surface of the pipe, and FIG. 2 is an enlarged view of section A in FIG. 1: Piping 2: Rubber lining removal, 4: Closing member 6α: Pressurizing pipe (pressurizing means) 5: Rubber lining adapter L: Length of piping l t ', w' Length of lining material 2 - 12: :
j′ Length S of lining adapter 5: Closing member 6,
4 intervals (2 people outside)

Claims (1)

【特許請求の範囲】[Claims] 据付状態にある配管の内面に、ゴムライニングを装着す
るに当り、ゴムライニング制とゴムライニングアダプタ
ーを用い、まず、ゴムライニング材を加圧下において、
上記配管の内面の一部に圧着したのち、ゴムライニング
アダプターを、同じく加圧下において、該配管の内面の
残部に、上記ゴムライニング祠とゴムライニングアダプ
ターの接合部の内周面が面一となるように圧着すること
により、配管の内面の全長に亘り、均一な厚さのゴムラ
イニングを形成することを特徴とする配管内面へのイム
ライニング施工方法。When attaching the rubber lining to the inner surface of the installed pipe, first place the rubber lining material under pressure using a rubber lining system and a rubber lining adapter.
After crimping a part of the inner surface of the pipe, the rubber lining adapter is also placed under pressure so that the inner peripheral surface of the joint between the rubber lining and the rubber lining adapter is flush with the remaining inner surface of the pipe. A method for imlining the inner surface of a pipe, which is characterized by forming a rubber lining with a uniform thickness over the entire length of the inner surface of the pipe by crimping the pipe in a manner similar to the above.
JP58176249A 1983-09-26 1983-09-26 Lining method of rubber on inner surface of piping Pending JPS6067134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58176249A JPS6067134A (en) 1983-09-26 1983-09-26 Lining method of rubber on inner surface of piping

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58176249A JPS6067134A (en) 1983-09-26 1983-09-26 Lining method of rubber on inner surface of piping

Publications (1)

Publication Number Publication Date
JPS6067134A true JPS6067134A (en) 1985-04-17

Family

ID=16010257

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58176249A Pending JPS6067134A (en) 1983-09-26 1983-09-26 Lining method of rubber on inner surface of piping

Country Status (1)

Country Link
JP (1) JPS6067134A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1049176C (en) * 1994-07-07 2000-02-09 孙亚洲 Method for welding lining with rubber

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1049176C (en) * 1994-07-07 2000-02-09 孙亚洲 Method for welding lining with rubber

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