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发明名称
Amplificateur de courant continu avec deux lampes en série chauffées par la source de courant anodique
摘要
申请公布号
FR38523(E)
申请公布日期
1931.06.13
申请号
FRD38523
申请日期
1930.04.15
申请人
发明人
ASCH ERICH
分类号
H03F1/50;H03F3/36
主分类号
H03F1/50
代理机构
代理人
主权项
地址
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