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发明名称
Phonographe ou autre appareil acoustique et conduits acoutisques
摘要
申请公布号
FR36852(E)
申请公布日期
1930.09.20
申请号
FRD36852
申请日期
1929.04.30
申请人
发明人
BERTHOD EMILE
分类号
H04R11/08
主分类号
H04R11/08
代理机构
代理人
主权项
地址
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