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发明名称
摘要
申请公布号
SU557853(A1)
申请公布日期
1977.05.15
申请号
SU19721781025
申请日期
1972.05.04
申请人
发明人
分类号
B21F27/00;B65H59/00;D03J5/00;(IPC1-7):B21F27/00
主分类号
B21F27/00
代理机构
代理人
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