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发明名称
Dispositif amplificateur pour machines parlantes, particulièrement applicable aux machines parlantes portatives
摘要
申请公布号
FR679549(A)
申请公布日期
1930.04.14
申请号
FRD679549
申请日期
1929.07.30
申请人
发明人
LETORD RENE
分类号
H04R27/00
主分类号
H04R27/00
代理机构
代理人
主权项
地址
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