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经营范围
发明名称
WELL TOOL LOCATING SYSTEM
摘要
申请公布号
GB1587045(A)
申请公布日期
1981.03.25
申请号
GB19780013296
申请日期
1978.04.05
申请人
OTIS ENG CORP
发明人
分类号
E21B23/02;E21B23/10;(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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