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发明名称
Wellhead assembly with telescoping casing hanger
摘要
申请公布号
GB201120221(D0)
申请公布日期
2012.01.04
申请号
GB20110020221
申请日期
2011.11.23
申请人
VETCO GRAY, INC
发明人
分类号
主分类号
代理机构
代理人
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