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发明名称
摘要
申请公布号
SU537801(A1)
申请公布日期
1976.12.05
申请号
SU19752147464
申请日期
1975.05.16
申请人
发明人
分类号
B25B21/00;B25B29/02;(IPC1-7):B25B21/00
主分类号
B25B21/00
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代理人
主权项
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