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发明名称
Improvements relating to snubbing apparatus for oil wells
摘要
申请公布号
GB378030(A)
申请公布日期
1932.08.05
申请号
GB19310003733
申请日期
1931.02.05
申请人
LEWIS MERVYN CECIL SEAMARK
发明人
分类号
E21B19/00
主分类号
E21B19/00
代理机构
代理人
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