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发明名称
ROOM MONITORING METHOD AND APPARATUS IN KEY PHONE SYSTEM HAVING A KEY PHONE WITH MICROPHONE
摘要
申请公布号
KR100480255(B1)
申请公布日期
2005.04.06
申请号
KR20010060758
申请日期
2001.09.28
申请人
发明人
分类号
H04M11/04;(IPC1-7):H04M11/04
主分类号
H04M11/04
代理机构
代理人
主权项
地址
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