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发明名称
Well tool
摘要
申请公布号
US2384090(A)
申请公布日期
1945.09.04
申请号
US19440559592
申请日期
1944.10.20
申请人
LEE HARTSELL
发明人
HARTSELL LEE
分类号
E21B31/08;E21B34/12
主分类号
E21B31/08
代理机构
代理人
主权项
地址
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