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经营范围
发明名称
SUBSEA WELL HANGER
摘要
申请公布号
US5082060(A)
申请公布日期
1992.01.21
申请号
US19900464809
申请日期
1990.01.16
申请人
NATIONAL-OILWELL (U.K.) LIMITED
发明人
JOHNSON, CHARLES S.;HART, ROBERT
分类号
E21B33/043
主分类号
E21B33/043
代理机构
代理人
主权项
地址
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