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经营范围
发明名称
Blowout preventer
摘要
申请公布号
GB955452(A)
申请公布日期
1964.04.15
申请号
GB19620033000
申请日期
1962.08.28
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V.
发明人
分类号
E21B33/06;E21B33/064
主分类号
E21B33/06
代理机构
代理人
主权项
地址
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