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经营范围
发明名称
DIGITAL ECHO SUPPRESSOR
摘要
申请公布号
GB1495638(A)
申请公布日期
1977.12.21
申请号
GB19750021704
申请日期
1975.05.21
申请人
COMMUNICATIONS SATELLITE CORP
发明人
分类号
H04B3/20;H04M9/10;(IPC1-7):H04B3/20
主分类号
H04B3/20
代理机构
代理人
主权项
地址
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