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发明名称
LOCATING AND LOCING APPARATUS FOR OIL OR GAS WELL TOOLS
摘要
申请公布号
GB1561847(A)
申请公布日期
1980.03.05
申请号
GB19760030724
申请日期
1976.07.23
申请人
OTIS ENG CORP
发明人
分类号
E21B23/02;E21B34/00;E21B34/10;E21B34/14;(IPC1-7):E21B23/02
主分类号
E21B23/02
代理机构
代理人
主权项
地址
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