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发明名称
METHOD OF AND APPARATUS FOR TELEMETERING INFORMATION FROM A POINT IN A WELL BORE HOLE TO THE EARTH'S SURFACE
摘要
申请公布号
GB1591431(A)
申请公布日期
1981.06.24
申请号
GB19780001956
申请日期
1978.01.18
申请人
AINSWORTH C L;LEACH C H
发明人
分类号
E21B47/18;(IPC1-7):G08C23/00
主分类号
E21B47/18
代理机构
代理人
主权项
地址
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