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发明名称
Directional electret condenser microphone
摘要
申请公布号
KR100603139(B1)
申请公布日期
2006.07.20
申请号
KR20040018535
申请日期
2004.03.18
申请人
发明人
分类号
H04R19/04
主分类号
H04R19/04
代理机构
代理人
主权项
地址
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