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经营范围
发明名称
Directional drilling apparatus
摘要
申请公布号
US3196959(A)
申请公布日期
1965.07.27
申请号
US19610131279
申请日期
1961.08.14
申请人
JEAN K. LAMPHERE;ARCHER W. KAMMERER, JR.
发明人
KAMMERER ARCHER W.
分类号
E21B7/06;E21B7/08
主分类号
E21B7/06
代理机构
代理人
主权项
地址
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