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发明名称
BLOWOUT PREVENTER PACKING UNIT WITH SLANTED REINFORCING INSERTS
摘要
申请公布号
GB2002438(B)
申请公布日期
1982.02.24
申请号
GB19780026423
申请日期
1978.06.06
申请人
HYDRIL CO
发明人
分类号
E21B33/06;(IPC1-7):E21B33/06
主分类号
E21B33/06
代理机构
代理人
主权项
地址
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