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发明名称
Well tool and joint
摘要
申请公布号
US1777591(A)
申请公布日期
1930.10.07
申请号
US19290373137
申请日期
1929.06.24
申请人
ERNEST I. TIBBET
发明人
THOMAS IDRIS
分类号
E21B17/06
主分类号
E21B17/06
代理机构
代理人
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