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发明名称
Tubular drill string member
摘要
申请公布号
US2999552(A)
申请公布日期
1961.09.12
申请号
US19590797180
申请日期
1959.03.04
申请人
FOX FRED K
发明人
FOX FRED K.
分类号
E21B17/16;E21B17/22
主分类号
E21B17/16
代理机构
代理人
主权项
地址
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