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1998-06-23
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1988-02-09
Pipe belling apparatus
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Joinder of plastic pipe
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1982-11-09
Method for repairing a pipe coupling
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1985-01-28
Fremgangsmaate til fremstilling av et roer
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1980-06-30
Method and apparatus for making joint on a pipe
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1980-09-23
Method for making seat assembly for butterfly valves
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1978-05-16
Connector method and apparatus for coupling two systems together while excluding the environment from the system interiors
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1979-09-12
Clamping and sealing device for jointing two interfitting pipe portions
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1957-05-28
Method of joining and sealing pipe sections
JPS63145891A
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1988-06-17
圧送用仮設配管の連結具
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1975-12-19
Sealing spigot and socket pipe joints in situ. - partic. for low humidity high pressure gas pipelines
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1975-11-25
Sealing spigot and socket pipe joints in situ. - partic. for low humidity high pressure gas pipelines
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1986-11-14
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1983-07-08
内面セメントモルタルライニング管
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1984-04-02
管継手の雌継手片
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1985-12-11
流体管継ぎ手
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1987-08-25
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1986-05-21
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1989-05-16
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1984-12-03
管継ぎ手
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1989-06-05
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1990-10-02
Method and apparatus for seating a gasket in a large diameter bell
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1986-08-09