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经营范围
发明名称
Wellhead apparatus
摘要
申请公布号
GB2252115(B)
申请公布日期
1995.01.04
申请号
GB19910001799
申请日期
1991.01.28
申请人
* DRIL-QUIP, INC.
发明人
LARRY E * REIMERT
分类号
E21B33/043;(IPC1-7):E21B33/043
主分类号
E21B33/043
代理机构
代理人
主权项
地址
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