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发明名称
Apparatus for determining point at which a pipe is stuck in a well
摘要
申请公布号
US2716890(A)
申请公布日期
1955.09.06
申请号
US19490119302
申请日期
1949.10.03
申请人
MARTIN PHILIP W
发明人
MARTIN PHILIP W.
分类号
E21B47/09
主分类号
E21B47/09
代理机构
代理人
主权项
地址
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