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发明名称
Improvements in and relating to sound reproducing devices
摘要
申请公布号
GB403354(A)
申请公布日期
1933.12.21
申请号
GB19320007571
申请日期
1932.03.14
申请人
INTERNATIONAL GENERAL ELECTRIC COMPANY INCORPORATED
发明人
分类号
H04R9/02
主分类号
H04R9/02
代理机构
代理人
主权项
地址
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