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发明名称
Dispositif métallique expansible d'étanchéité
摘要
申请公布号
FR1422902(A)
申请公布日期
1966.01.03
申请号
FR19640988996
申请日期
1964.09.23
申请人
OTIS ENGINEERING CORPORATION
发明人
分类号
E21B33/127
主分类号
E21B33/127
代理机构
代理人
主权项
地址
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