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发明名称
Haut-parleur
摘要
申请公布号
FR680739(A)
申请公布日期
1930.05.05
申请号
FRD680739
申请日期
1929.08.23
申请人
发明人
MIDHAT CHAKIR
分类号
H04R7/00
主分类号
H04R7/00
代理机构
代理人
主权项
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