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发明名称
Production tree with multiple safety barriers
摘要
申请公布号
GB0217195(D0)
申请公布日期
2002.09.04
申请号
GB20020017195
申请日期
2002.07.25
申请人
ABB VETCO GRAY, INC.
发明人
分类号
E21B33/035;E21B33/043;E21B33/047;E21B34/04
主分类号
E21B33/035
代理机构
代理人
主权项
地址
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