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发明名称
Marine oil drilling machine
摘要
申请公布号
US2534480(A)
申请公布日期
1950.12.19
申请号
US19470735832
申请日期
1947.03.20
申请人
JOSEPH SHANNON
发明人
SHANNON JOSEPH
分类号
E02B17/02;E21B7/136;E21B33/037
主分类号
E02B17/02
代理机构
代理人
主权项
地址
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