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发明名称
Ventillegeme og kuleventil
摘要
申请公布号
NO175398(C)
申请公布日期
1994.10.05
申请号
NO19920001881
申请日期
1992.05.13
申请人
NORSKE STATS OLJESELSKAP AS, DEN
发明人
HORVEI, KNUT VODJU
分类号
E21B34/00;E21B34/04;F16K5/20;(IPC1-7):F16K5/20
主分类号
E21B34/00
代理机构
代理人
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地址
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