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发明名称
摘要
申请公布号
PL69963(A5)
申请公布日期
1973.12.31
申请号
PL19710152241
申请日期
1971.12.17
申请人
发明人
分类号
B21D5/01;(IPC1-7):B21D5/01
主分类号
B21D5/01
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代理人
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地址
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