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发明名称
ECHO CANCELLER
摘要
申请公布号
JPH03123125(A)
申请公布日期
1991.05.24
申请号
JP19890260011
申请日期
1989.10.06
申请人
HITACHI LTD
发明人
EZAKI TOMOHIRO;OTA GICHU
分类号
H04B3/23
主分类号
H04B3/23
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代理人
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