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经营范围
发明名称
Method and apparatus for graveling wells
摘要
申请公布号
US2349062(A)
申请公布日期
1944.05.16
申请号
US19420436424
申请日期
1942.03.27
申请人
THE TEXAS COMPANY
发明人
UREN LESTER CHARLES
分类号
E21B43/04
主分类号
E21B43/04
代理机构
代理人
主权项
地址
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