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经营范围
发明名称
Apparatus for drilling boreholes
摘要
申请公布号
US2701123(A)
申请公布日期
1955.02.01
申请号
US19500182005
申请日期
1950.08.29
申请人
STANDARD OIL DEVELOPMENT COMPANY
发明人
MOORE THOMAS V.
分类号
E21B4/00;E21B10/08;E21B17/10
主分类号
E21B4/00
代理机构
代理人
主权项
地址
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