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经营范围
发明名称
Underwater wellhead assembly
摘要
申请公布号
GB999838(A)
申请公布日期
1965.07.28
申请号
GB19630025298
申请日期
1963.06.25
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V.
发明人
分类号
E21B33/035
主分类号
E21B33/035
代理机构
代理人
主权项
地址
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