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发明名称
摘要
申请公布号
SU547272(A1)
申请公布日期
1977.02.25
申请号
SU19742009279
申请日期
1974.03.25
申请人
发明人
分类号
B21H3/04;(IPC1-7):B21H3/04
主分类号
B21H3/04
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