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发明名称
ECHO CANCELLER CONTROL SYSTEM
摘要
申请公布号
JPH04117855(A)
申请公布日期
1992.04.17
申请号
JP19900237397
申请日期
1990.09.07
申请人
NEC CORP
发明人
MIYAHARA KEIICHI
分类号
H04M3/26;H04B3/23
主分类号
H04M3/26
代理机构
代理人
主权项
地址
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