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发明名称
Anordning ved avviksbor
摘要
申请公布号
NO985756(D0)
申请公布日期
1998.12.09
申请号
NO19980005756
申请日期
1998.12.09
申请人
DEVICO AS
发明人
TOKLE, VIKTOR
分类号
E21B7/10;E21B7/04;E21B7/06;E21B17/10;(IPC1-7):E21B
主分类号
E21B7/10
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代理人
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