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发明名称
Perfectionnements aux ampliflcations acoustiques
摘要
申请公布号
FR35692(E)
申请公布日期
1930.03.27
申请号
FRD35692
申请日期
1928.06.08
申请人
发明人
BOUTEILLE JOSEPH
分类号
H04R1/24;H04R7/12
主分类号
H04R1/24
代理机构
代理人
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