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发明名称
Perfectionnements aux cathodes émissives pour tubes électroniques
摘要
申请公布号
FR1077643(A)
申请公布日期
1954.11.10
申请号
FRD1077643
申请日期
1953.03.25
申请人
COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL
发明人
分类号
H01J1/20;H01J17/06
主分类号
H01J1/20
代理机构
代理人
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地址
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