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发明名称
Dispositif pour supprimer les échos sur les lignes téléphoniques
摘要
申请公布号
FR1542094(A)
申请公布日期
1968.10.11
申请号
FR19670126376
申请日期
1967.10.30
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
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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