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发明名称
Perfectionnements apportés aux amplificateurs à basse fréquence et haut-parleurs
摘要
申请公布号
FR38452(E)
申请公布日期
1931.06.06
申请号
FRD38452
申请日期
1929.09.05
申请人
发明人
CADENEL LOUIS
分类号
H03F1/40;H04R3/12
主分类号
H03F1/40
代理机构
代理人
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