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经营范围
发明名称
Improvements relating to rotary drill bits
摘要
申请公布号
EP0710765(A3)
申请公布日期
1996.12.27
申请号
EP19950306938
申请日期
1995.09.29
申请人
CAMCO DRILLING GROUP LIMITED
发明人
NEWTON, ALEX;TAYLOR, MALCOLM R.;FULLER, JOHN M.;MURDOCK, ANDY
分类号
E21B10/42;E21B10/43;E21B10/54;E21B10/55;E21B10/60;(IPC1-7):E21B10/54
主分类号
E21B10/42
代理机构
代理人
主权项
地址
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