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发明名称
Perfectionnements aux tubes électroniques à modulation de vitesse
摘要
申请公布号
FR975131(A)
申请公布日期
1951.03.01
申请号
FRD975131
申请日期
1942.02.12
申请人
COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL
发明人
分类号
H01J25/16
主分类号
H01J25/16
代理机构
代理人
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