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发明名称
OIL WELL DRILLING RIG ASSEMBLY
摘要
申请公布号
GB8402009(D0)
申请公布日期
1984.02.29
申请号
GB19840002009
申请日期
1984.01.26
申请人
LANE, G E
发明人
分类号
E21B19/15;(IPC1-7):E21B19/15
主分类号
E21B19/15
代理机构
代理人
主权项
地址
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