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发明名称
摘要
申请公布号
FR2399883(B1)
申请公布日期
1980.04.18
申请号
FR19770024457
申请日期
1977.08.08
申请人
INST RECHERCHE SIDERURGIE FSE
发明人
分类号
B21B37/16;B21B37/52;(IPC1-7):B21B37/12
主分类号
B21B37/16
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