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经营范围
发明名称
ECHO REMOVING DEVICE
摘要
申请公布号
JPH01123534(A)
申请公布日期
1989.05.16
申请号
JP19870281331
申请日期
1987.11.06
申请人
NEC CORP
发明人
NAKAGAWA FUJIO;KANEMASA AKIRA
分类号
H04B3/23
主分类号
H04B3/23
代理机构
代理人
主权项
地址
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