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发明名称
Oil well drilling string
摘要
申请公布号
US3152458(A)
申请公布日期
1964.10.13
申请号
US19630305114
申请日期
1963.08.28
申请人
PITTSBURGH STEEL COMPANY
发明人
SIMONIN JOSEPH E.
分类号
E21B17/00
主分类号
E21B17/00
代理机构
代理人
主权项
地址
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