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发明名称
Perfectionnements se rapportant aux haut-parleurs et aux instruments analogues
摘要
申请公布号
FR791720(A)
申请公布日期
1935.12.16
申请号
FRD791720
申请日期
1935.06.25
申请人
GLEN'S PATENTS AND HOLDINGS LIMITED
发明人
分类号
H04R1/20;H04R1/34
主分类号
H04R1/20
代理机构
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