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发明名称
ROTARY DRILLING BIT
摘要
申请公布号
SU905415(A1)
申请公布日期
1982.02.15
申请号
SU19792705950
申请日期
1979.01.08
申请人
VNII BUROVOJ TEKHNIKI
发明人
BARABASHKIN IGOR I,SU;BLINKOV GENNADIJ V,SU;VAKHLYAEVA TATYANA M,SU;LUKASHKIN ALEKSANDR I,SU;MATVEEV GRIGORIJ I,SU;SIANKA-IBARRA LUIS,SU
分类号
E21B10/22;(IPC1-7):E21B10/22
主分类号
E21B10/22
代理机构
代理人
主权项
地址
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