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发明名称
Tubing caliper
摘要
申请公布号
US2708316(A)
申请公布日期
1955.05.17
申请号
US19510234714
申请日期
1951.07.02
申请人
OTIS PRESSURE CONTROL, INC.
发明人
FREDD JOHN V.
分类号
E21B47/08
主分类号
E21B47/08
代理机构
代理人
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地址
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