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发明名称
Means and method of surveying wells
摘要
申请公布号
US2369403(A)
申请公布日期
1945.02.13
申请号
US19420463920
申请日期
1942.10.30
申请人
JAMES V. ROBINSON
发明人
NEVILL GALE E.
分类号
E21B47/022
主分类号
E21B47/022
代理机构
代理人
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地址
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