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发明名称
Verbesserungen an Drehbohrmeisseln
摘要
申请公布号
DE69319862(T2)
申请公布日期
1999.02.11
申请号
DE19936019862T
申请日期
1993.12.07
申请人
CAMCO DRILLING GROUP LTD., STONEHOUSE, GLOUCESTERSHIRE, GB
发明人
GRIFFIN, NIGEL DENNIS, WHITMINSTER, GLOUCESTERSHIRE, GB
分类号
E21B10/52;E21B10/56;E21B10/573;(IPC1-7):E21B10/56
主分类号
E21B10/52
代理机构
代理人
主权项
地址
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