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发明名称
Piezoelectric sounder and drive circuit arranged to reproduce an alarm tone and a voice message
摘要
申请公布号
GB2388994(A)
申请公布日期
2003.11.26
申请号
GB20020011986
申请日期
2002.05.23
申请人
* GENT LIMITED
发明人
MICHAEL * BARSON
分类号
B06B1/02;(IPC1-7):H04R3/00;B06B1/06
主分类号
B06B1/02
代理机构
代理人
主权项
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