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发明名称
Dispositif pour l'amplification de courants à fréquence audible ou téléphonique
摘要
申请公布号
FR762440(A)
申请公布日期
1934.04.11
申请号
FRD762440
申请日期
1933.10.17
申请人
发明人
LORIOT MAXIME LOUIS FRANCE
分类号
H03F13/00
主分类号
H03F13/00
代理机构
代理人
主权项
地址
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