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发明名称
Formation testing apparatus for deep wells
摘要
申请公布号
US2713911(A)
申请公布日期
1955.07.26
申请号
US19500182801
申请日期
1950.09.01
申请人
JOHNSTON TESTERS, INC.
发明人
BAGUELL EDGAR W.
分类号
E21B49/08
主分类号
E21B49/08
代理机构
代理人
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地址
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