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发明名称
COMBINATION WELL BLOWOUT PREVENTER
摘要
申请公布号
GB1249614(A)
申请公布日期
1971.10.13
申请号
GB19700006432
申请日期
1970.02.10
申请人
HYDRIL COMPANY
发明人
分类号
E21B33/06;E21B33/064;E21B34/00;E21B34/02;E21B34/04;F16K5/06
主分类号
E21B33/06
代理机构
代理人
主权项
地址
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