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发明名称
APPARATUS FOR CONTROLLING MEASURING CIRCUITS OF UNDERGROUND INSTRUMENTS INSTALLED IN BOREHOLES
摘要
申请公布号
PL129962(B2)
申请公布日期
1984.06.30
申请号
PL19820236455
申请日期
1982.05.14
申请人
发明人
分类号
E21B;E21B44/00;E21B49/00;G05D13/62;(IPC1-7):E21B49/00
主分类号
E21B
代理机构
代理人
主权项
地址
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