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发明名称
Feilsikkert styresystem for en bronnsikringsventil
摘要
申请公布号
NO317575(B1)
申请公布日期
2004.11.15
申请号
NO19990004192
申请日期
1999.08.30
申请人
BAKER HUGHES INC
发明人
BEALL CLIFFORD H
分类号
E21B34/10;E21B34/16;(IPC1-7):E21B34/06;E21B34/12
主分类号
E21B34/10
代理机构
代理人
主权项
地址
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