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发明名称
摘要
申请公布号
FR2432903(B1)
申请公布日期
1984.08.17
申请号
FR19790020513
申请日期
1979.08.10
申请人
HITACHI LTD
发明人
分类号
B21B39/12;B21D39/06;B21D39/20;B21D41/02;(IPC1-7):B21D39/06;B21D53/08
主分类号
B21B39/12
代理机构
代理人
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地址
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