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发明名称
BOREHOLE REAMER
摘要
申请公布号
SU1564321(A1)
申请公布日期
1990.05.15
申请号
SU19874361869
申请日期
1987.12.03
申请人
GEJ BORIS A,SU
发明人
GEJ BORIS A,SU
分类号
E21B7/28
主分类号
E21B7/28
代理机构
代理人
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