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经营范围
发明名称
EKSPANSJONSELEMENT.
摘要
申请公布号
NO873206(A)
申请公布日期
1989.02.01
申请号
NO19870003206
申请日期
1987.07.31
申请人
NORSKE STATS OLJESELSKAP A.S., DEN
发明人
NILSEN, MAGNE PETTER
分类号
E21B;(IPC1-7):E21B/
主分类号
E21B
代理机构
代理人
主权项
地址
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