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摘要
申请公布号
SU547258(A1)
申请公布日期
1977.02.25
申请号
SU19752120423
申请日期
1975.04.04
申请人
发明人
分类号
B21D5/00;B21D22/02;B21D37/08;B21D53/00;(IPC1-7):B21D5/00
主分类号
B21D5/00
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