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发明名称
Improvements in or relating to electrical translating devices such as loud speakers
摘要
申请公布号
GB362959(A)
申请公布日期
1931.12.03
申请号
GB19300026271
申请日期
1930.09.03
申请人
THE GENERAL ELECTRIC COMPANY LIMITED;DONALD ARTHUR OLIVER
发明人
分类号
H04R1/28
主分类号
H04R1/28
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