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发明名称
Well tools
摘要
申请公布号
US2884073(A)
申请公布日期
1959.04.28
申请号
US19560621156
申请日期
1956.11.08
申请人
OTIS ENGINEERING CORPORATION
发明人
BOSTOCK JAMES H.;SIMON DICK S.
分类号
E21B31/107
主分类号
E21B31/107
代理机构
代理人
主权项
地址
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