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Title:
【発明の名称】継目無管の製造方法
Document Type and Number:
Japanese Patent JP3082489
Kind Code:
B2
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Inventors:
Tomio Yamakawa
Application Number:
JP35890292A
Publication Date:
August 28, 2000
Filing Date:
November 18, 1992
Export Citation:
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Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
B21B19/04; B21B37/18; B21B37/78; (IPC1-7): B21B19/04; B21B37/18; B21B37/78
Domestic Patent References:
JP569011A
JP5944927B2
Attorney, Agent or Firm:
Norio Kawano



 
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