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发明名称
摘要
申请公布号
SU363572(A1)
申请公布日期
1972.12.25
申请号
SU19691376300
申请日期
1969.10.21
申请人
发明人
分类号
B24B3/00;(IPC1-7):B24B3/00
主分类号
B24B3/00
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