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经营范围
发明名称
KONVERTER.
摘要
申请公布号
AT107393(T)
申请公布日期
1994.07.15
申请号
AT19900916187T
申请日期
1990.10.31
申请人
DEN NORSKE STATS OLJESELSKAP A.S.
发明人
HORVEI, KNUT;JOHNSEN, IDAR, G.
分类号
E21B21/10;E21B;E21B7/18;E21B21/00;(IPC1-7):E21B7/18
主分类号
E21B21/10
代理机构
代理人
主权项
地址
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