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发明名称
Perfectionnements aux tubes à décharge électronique
摘要
申请公布号
FR704615(A)
申请公布日期
1931.05.22
申请号
FRD704615
申请日期
1930.10.08
申请人
COMPAGNIE FRANCAISE POUR L'EXPLOITATION DES PROCEDES THOMSON-HOUSTON
发明人
分类号
H01J25/52
主分类号
H01J25/52
代理机构
代理人
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地址
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