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发明名称
Fremgangsmåte og anordning ved montering av et stigerör til en undersjöisk böye
摘要
申请公布号
NO177544(C)
申请公布日期
1995.10.04
申请号
NO19920002679
申请日期
1992.07.08
申请人
NORSK HYDRO AS
发明人
ASKESTAD, SIGMUND
分类号
E21B;E21B17/01;E21B43/01;(IPC1-7):E21B17/01
主分类号
E21B
代理机构
代理人
主权项
地址
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