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发明名称
ECHO CANCELLER CONTROL SYSTEM
摘要
申请公布号
JPH01221027(A)
申请公布日期
1989.09.04
申请号
JP19880046565
申请日期
1988.02.29
申请人
NEC CORP
发明人
HOSAKA TAKEMI
分类号
H04M11/00;H04B3/20
主分类号
H04M11/00
代理机构
代理人
主权项
地址
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