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发明名称
Ram construction for blowout preventers
摘要
申请公布号
US2318882(A)
申请公布日期
1943.05.11
申请号
US19410423508
申请日期
1941.12.18
申请人
THE NATIONAL SUPPLY COMPANY
发明人
NEVILL GALE E.;LEMAN ARTHUR L.
分类号
E21B33/06
主分类号
E21B33/06
代理机构
代理人
主权项
地址
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