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发明名称
BELLOWS VALVE
摘要
申请公布号
EP2167788(A1)
申请公布日期
2010.03.31
申请号
EP20080766916
申请日期
2008.06.05
申请人
PETROLEUM TECHNOLOGY COMPANY AS
发明人
KLEPPA, ERLING;STOKKA, OEYVIND;SEVHEIM, OLE
分类号
E21B43/12
主分类号
E21B43/12
代理机构
代理人
主权项
地址
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