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经营范围
发明名称
DRILLING GUIDANCE DEVICE
摘要
申请公布号
IE47345(B1)
申请公布日期
1984.02.22
申请号
IE19820002507
申请日期
1982.10.15
申请人
STANDARD OIL CO
发明人
分类号
E21B7/128;(IPC1-7):E21B7/12
主分类号
E21B7/128
代理机构
代理人
主权项
地址
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