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摘要
申请公布号
FR2097390(A5)
申请公布日期
1972.03.03
申请号
FR19700024838
申请日期
1970.07.03
申请人
VALLOUREC
发明人
分类号
B21F7/00;B21F29/02;E04H17/04;(IPC1-7):E04H17/00
主分类号
B21F7/00
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