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发明名称
Verrohrungsaufhängung für Bohrlochkopf.
摘要
申请公布号
DE69108021(T2)
申请公布日期
1995.07.06
申请号
DE19916008021T
申请日期
1991.07.19
申请人
COOPER INDUSTRIES, INC., HOUSTON, TEX., US
发明人
THORNBURROW, EDWARD THOMAS, LEEDS, WEST YORKSHIRE LS7 3DR, GB
分类号
E21B17/10;E21B33/04;(IPC1-7):E21B33/04
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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