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发明名称
摘要
申请公布号
SU416187(A1)
申请公布日期
1974.02.25
申请号
SU19711664490
申请日期
1971.05.20
申请人
发明人
分类号
B23D41/04;(IPC1-7):B23D41/04
主分类号
B23D41/04
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代理人
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