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发明名称
ELECTRET MICROPHONE
摘要
申请公布号
GB2015299(B)
申请公布日期
1982.05.06
申请号
GB19790005145
申请日期
1979.02.14
申请人
HOSHIDENKI SEIZO KK
发明人
分类号
H04R19/00;H04R19/01;(IPC1-7):H04R19/04
主分类号
H04R19/00
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代理人
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