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发明名称
Schaltungsanordnung für Fernsprechstationen mit Rückhördämpfung
摘要
申请公布号
AT196456(B)
申请公布日期
1958.03.25
申请号
ATD196456
申请日期
1957.01.04
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
分类号
主分类号
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