JPS6140543B2 - - Google Patents

Info

Publication number
JPS6140543B2
JPS6140543B2 JP53094051A JP9405178A JPS6140543B2 JP S6140543 B2 JPS6140543 B2 JP S6140543B2 JP 53094051 A JP53094051 A JP 53094051A JP 9405178 A JP9405178 A JP 9405178A JP S6140543 B2 JPS6140543 B2 JP S6140543B2
Authority
JP
Japan
Prior art keywords
peripheral surface
metal wire
joint
rubber ring
inner peripheral
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
Application number
JP53094051A
Other languages
English (en)
Other versions
JPS5521232A (en
Inventor
Ryoji Fukumoto
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 Plastics Inc
Original Assignee
Mitsubishi Plastics Inc
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 Plastics Inc filed Critical Mitsubishi Plastics Inc
Priority to JP9405178A priority Critical patent/JPS5521232A/ja
Publication of JPS5521232A publication Critical patent/JPS5521232A/ja
Publication of JPS6140543B2 publication Critical patent/JPS6140543B2/ja
Granted 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
    • 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
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • 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
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/01—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
    • B29C66/01—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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1226—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least one bevelled joint-segment
    • B29C66/12261—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least one bevelled joint-segment the two joint-segments being bevelled, e.g. the two joint-segments forming a V
    • 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
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • 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
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
    • 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
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52296—Joining tubular articles involving the use of a socket said socket comprising sealing elements, e.g. gaskets
    • 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
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • 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
    • B29K2305/00—Use of metals, their alloys or their compounds, as reinforcement
    • B29K2305/08—Transition metals
    • B29K2305/12—Iron
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0068—Permeability to liquids; Adsorption
    • B29K2995/0069—Permeability to liquids; Adsorption non-permeable

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】 本発明は、ポリエチレン、ポリプロプレン等の
ポリオレフン系樹脂管の熱線溶着継手に関し、さ
らに詳しくは、接続管とは熱溶着させると共に、
ゴムリングによつてさらに水密性を高めるように
なしたポリオレフン系樹脂の熱線溶着継手に関す
る。
従来、ポリオレフン系樹脂管の接続に当つては
第５図に示すように、接続管１，１′と同質材料
の円筒状継手２の内周面全体にわたつて金属線３
を螺旋状に埋込み、この継手２に接続管１，１′
を挿入した後、金属線３に電流を通し、これによ
つて発生するジユール熱によつて両者を溶着接合
していた。しかしながら、上記継手による接続管
の溶着接合には、金属線を発熱させたときに、金
属線に沿つて間隙が発生することがあり、該間隙
を伝つて管内流体が漏洩する危険性があつた。
また、第６図に示すように、継手の両端から挿
入接続した接続管の端面に隙間ｓが生じると、こ
の部分では継手の内周面に埋設した金属線が露出
するために電熱線を発熱させたとき、継手内周面
は溶融し、Ｖ字状のノツチが発生する。この様な
接続状態の配管に圧力流体を流すと、この圧力に
よつてＶ字状のノツチに応力が集中し、この部分
で破壊するという問題があつた。
本発明は、かかる従来欠点を改善したものであ
つて、ゴムリングによつて水密性を高めると共に
熱溶着の際にＶ字状のノツチが発生することのな
いポリオレフン系樹脂管の熱線溶着継手を提供す
るものである。
以下、本発明を図面にて詳細に説明する。
第１〜２図は、本発明の一実施例を示す断面
図、第３〜４図は他の実施例を示す断面図であつ
て、図中１，１′は接続管、２は継手、３は金属
線、４はゴムリングである。
第１〜２図に示す実施にあつては、継手２の内
周面にステンレス線等の金属線３（通常、線径
0.6〜1.0φが好適）を３〜６mmのピツチで螺旋状
に巻回して埋込み、さらにその奥部に環状溝２１
を設け、該環状溝２１にゴムリング４を装着して
受口２２を形成する。この継手２を用いて接続管
１，１′を接続するには、受口２２，２２にそれ
ぞれ接続管１，１′を挿入し管端部外周面をゴム
リング４に密接させた後、金属線３に所定時間電
流を流し、受口２２の内周面と接続管１，１′の
外周面を溶融させて接合する。
第３〜４図に示す実施例にあつては、継手２の
両端内周面を拡径させてテーパ部２３を形成し、
該テーパ部２３の奥部にゴムリング４をはめ込ん
だ後テーパ状をなす継手２と同材質からなるリン
グ２４を押込み、受口２２に挿入した接続管１，
１′を溶着接合するものである。即ち、リング２
４のテーパ外周面、及び内周面には金属線３が螺
旋状に埋設されており、継手２の両端に接続管
１，１′を挿入した後、テーパ部２３の奥部にゴ
ムリング４をはめ込み、しかる後、継手２の外周
面にバンド６を巻回固定する。しかる後、接続管
１，１′の外周に固定した押圧具５を用いてテー
パ部２３内にリング２４を押込み金属線３に所定
時間電流を通す。しかしてリング２４を接続管
１，１′の外周面、及びテーパ部２３の内周面に
同時に溶融させて接続管１，１′を接続すること
ができる。この実施例の場合には、受口２２の奥
部にテーパ部２３の奥部とリング２４によつて環
状溝が形成され、該溝内に装着したゴムリング４
が接続管１，１′の端部外周面と密接しているの
で、前記実施例と同様に金属線３に沿つて間隙が
発生しても管内流体が漏洩する虞れは全くない。
以上の如く、本発明の熱線溶着継手は、受口の
内周面に金属線を埋設したので、この金属線に電
流を流すという簡単な操作によつて、接続管との
溶着接合が行える。しかも受口の奥部には接続管
の端部外周面と密接するゴムリングを装着して金
属線が接続管の先端部からはみ出さないようにし
たので、継手内周面にノツチが発生して、この部
分で破壊する虞れが全くない。
また、金属線を発熱させて受口内周面と接続管
の外周面とを溶着接合した際に金属線に沿つて間
隙が発生しても、受口の奥部にゴムリングをはめ
込んで水密性を維持しているためにこの部分で漏
水する危険性は全くなく、二重の安全性を保障す
るものである。
【図面の簡単な説明】
第１図は本発明の一実施例を示す縦断側面図、
第２図は他の実施例を示す縦断側面図、第３図お
よび第４図はさらに他の実施例を示す半断側面
図、第５図は従来の実施例を示す断面図、第６図
はこれを溶着した時の状態を示す断面図である。 １，１′……接続管、２……継手、３……金属
線、４……ゴムリング、２１……環状溝、２２…
…受口。

Claims (1)

    【特許請求の範囲】
  1. １ 接続管の外径とほぼ等しい内径を有する受口
    の内周面に金属線を螺旋状に埋設し、さらに該受
    口の奥部には環状溝を設けて該溝内に接続管の端
    部外周面と密接するゴムリングを装着したことを
    特徴とするポリオレフン系樹脂管の熱線溶着継
    手。
JP9405178A 1978-07-31 1978-07-31 Hot wire welded joint of polyolefin resin pipe Granted JPS5521232A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9405178A JPS5521232A (en) 1978-07-31 1978-07-31 Hot wire welded joint of polyolefin resin pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9405178A JPS5521232A (en) 1978-07-31 1978-07-31 Hot wire welded joint of polyolefin resin pipe

Publications (2)

Publication Number Publication Date
JPS5521232A JPS5521232A (en) 1980-02-15
JPS6140543B2 true JPS6140543B2 (ja) 1986-09-10

Family

ID=14099743

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9405178A Granted JPS5521232A (en) 1978-07-31 1978-07-31 Hot wire welded joint of polyolefin resin pipe

Country Status (1)

Country Link
JP (1) JPS5521232A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH039339B2 (ja) * 1987-09-30 1991-02-08 Mitsuboshi Belting Ltd

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62107193U (ja) * 1985-12-25 1987-07-08
JP2864507B2 (ja) * 1988-11-11 1999-03-03 日本鋼管株式会社 プラスチック管の融着継手
JP2792425B2 (ja) * 1994-03-15 1998-09-03 日本鋼管株式会社 電気融着継手の融着方法
EP2159037B1 (de) 2008-08-28 2011-04-13 Leister Process Technologies Verbindungs- oder Abzweigelement zum Verbinden mit einem Rohrendabschnitt im Laserdurchstrahlverfahren sowie Laserkopf und Verfahren zum Verbinden
CN101943195B (zh) * 2010-09-13 2012-07-11 中国核电工程有限公司 一种拉杆端部紧固接头及其制作方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH039339B2 (ja) * 1987-09-30 1991-02-08 Mitsuboshi Belting Ltd

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JPS5521232A (en) 1980-02-15

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