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经营范围
发明名称
Well drilling system
摘要
申请公布号
US3074492(A)
申请公布日期
1963.01.22
申请号
US19570663729
申请日期
1957.06.05
申请人
SOCONY MOBIL OIL COMPANY, INC.
发明人
CLEWELL DAYTON H.
分类号
E21B7/24
主分类号
E21B7/24
代理机构
代理人
主权项
地址
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