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发明名称
Dispositifs destinés à améliorer la tonalité des microphones et des haut-parleurs
摘要
申请公布号
FR48222(E)
申请公布日期
1937.11.23
申请号
FRD48222
申请日期
1936.07.11
申请人
发明人
LAKHOVSKY GEORGES
分类号
H04R1/34
主分类号
H04R1/34
代理机构
代理人
主权项
地址
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