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发明名称
CONTROL SYSTEM FOR A DRILLING APPARATUS
摘要
申请公布号
GB1481542(A)
申请公布日期
1977.08.03
申请号
GB19760031479
申请日期
1974.09.19
申请人
CONTINENTAL OIL CO
发明人
分类号
E21B4/18;E21B4/20;E21B7/04;E21B7/06;E21B7/08;E21B23/04;(IPC1-7):E21B7/08
主分类号
E21B4/18
代理机构
代理人
主权项
地址
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