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发明名称
DRILL BIT
摘要
申请公布号
RU1838008(C)
申请公布日期
1993.08.30
申请号
SU19914908905
申请日期
1991.02.06
申请人
KONSTRUKTORSKO-TEKHNOLOGICHESKOE BYURO TEKHNICHESKIKH SREDSTV BURENIYA SKVAZHIN
发明人
STEPANOV RAMIL V;MAVLYUTOV MIDKHAT R;MATYUSHIN PETR N;SHARIPOV NAIL B
分类号
E21B10/18
主分类号
E21B10/18
代理机构
代理人
主权项
地址
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