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发明名称
HYDRAULISK BORETAARN FOR OLJEBORING.
摘要
申请公布号
NO853065(A)
申请公布日期
1987.02.03
申请号
NO19850003065
申请日期
1985.08.02
申请人
LARSEN, EYVIND
发明人
LARSEN, EYVIND
分类号
E21B;E21B15/00;E21B19/08;(IPC1-7):E21B/
主分类号
E21B
代理机构
代理人
主权项
地址
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