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经营范围
发明名称
ROTARY DRILL BIT
摘要
申请公布号
SU973778(A1)
申请公布日期
1982.11.15
申请号
SU19802914837
申请日期
1980.03.12
申请人
INST GEOTEKHNICHESKOJ MEKHANIKI AN USSR
发明人
KUDRYA PETR P,SU;VLADISLAVLEV YURIJ E,SU;KOROLKO EVGENIJ I,SU
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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