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发明名称
Anordning for å redusere torsjonsmomentet i en borestreng
摘要
申请公布号
NO960597(A)
申请公布日期
1996.04.17
申请号
NO19960000597
申请日期
1996.02.15
申请人
SWIETLIK, GEORGE
发明人
SWIETLIK, GEORGE
分类号
E21B17/10;(IPC1-7):E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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