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经营范围
发明名称
Blowout preventer
摘要
申请公布号
US2883141(A)
申请公布日期
1959.04.21
申请号
US19570663721
申请日期
1957.06.05
申请人
CAMERON IRON WORKS, INC.
发明人
OLIVER JOHN P.
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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