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发明名称
TRYKKOMFORMER.
摘要
申请公布号
NO904991(A)
申请公布日期
1992.05.20
申请号
NO19900004991
申请日期
1990.11.19
申请人
NORSKE STATS OLJESELSKAP AS, DEN
发明人
HORVEI, KNUT
分类号
E21B;E21B7/18;F16K31/16;F16K31/53;F16K35/00;(IPC1-7):E21B7/18
主分类号
E21B
代理机构
代理人
主权项
地址
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