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发明名称
TOOTH OF ROTARY DRILL BIT
摘要
申请公布号
RU1812296(C)
申请公布日期
1993.04.30
申请号
SU19894736854
申请日期
1989.07.24
申请人
TRAVKIN VITALIJ S;FILATOV BORIS P;POLANSKIJ GRIGORIJ A
发明人
TRAVKIN VITALIJ S;FILATOV BORIS P;POLANSKIJ GRIGORIJ A
分类号
E21B10/16;(IPC1-7):E21B10/16
主分类号
E21B10/16
代理机构
代理人
主权项
地址
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