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发明名称
Soupape sensible à la pression dans un puits
摘要
申请公布号
FR1422862(A)
申请公布日期
1966.01.03
申请号
FR19640976596
申请日期
1964.06.01
申请人
发明人
JR JOHN SPLAWN PAGE,
分类号
E21B34/08
主分类号
E21B34/08
代理机构
代理人
主权项
地址
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