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经营范围
发明名称
Drilling control system
摘要
申请公布号
GB620911(A)
申请公布日期
1949.03.31
申请号
GB19470002941
申请日期
1947.01.30
申请人
N. V. DE BATAAFSCHE PETROLEUM MAATSCHAPPIJ
发明人
分类号
E21B19/08
主分类号
E21B19/08
代理机构
代理人
主权项
地址
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