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摘要
申请公布号
DE2017709(A1)
申请公布日期
1971.11.04
申请号
DE19702017709
申请日期
1970.04.14
申请人
发明人
分类号
B21D15/02;B21D17/04;B21H5/02;B21H7/18;(IPC1-7):B21D17/00
主分类号
B21D15/02
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