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发明名称
摘要
申请公布号
SU554922(A1)
申请公布日期
1977.04.25
申请号
SU19752178316
申请日期
1975.10.06
申请人
发明人
分类号
B21H3/12;(IPC1-7):B21H3/12
主分类号
B21H3/12
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代理人
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