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发明名称
A method of and means for ascertaining the angle of inclination of a borehole
摘要
申请公布号
GB422714(A)
申请公布日期
1935.01.17
申请号
GB19330021576
申请日期
1933.08.01
申请人
ABDEL-BADIA BAHNASAWI
发明人
分类号
E21B47/022
主分类号
E21B47/022
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代理人
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