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发明名称
TRANSPARENT FLAT PANEL SPEAKER
摘要
申请公布号
GB2052919(A)
申请公布日期
1981.01.28
申请号
GB19800019468
申请日期
1980.06.13
申请人
HITACHI LTD
发明人
分类号
H04R17/00;H04R17/10;(IPC1-7):H04R17/00
主分类号
H04R17/00
代理机构
代理人
主权项
地址
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