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发明名称
Public address apparatus
摘要
申请公布号
GB9820644(D0)
申请公布日期
1998.11.18
申请号
GB19980020644
申请日期
1998.09.22
申请人
VIMPEX LIMITED
发明人
分类号
H04R3/00;H04R27/00
主分类号
H04R3/00
代理机构
代理人
主权项
地址
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