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发明名称
Schaltungsanordnung fuer Fernsprechanlagen mit Sprechstellen verschiedener Berechtigung
摘要
申请公布号
DE492838(C)
申请公布日期
1930.02.28
申请号
DE1927E035409D
申请日期
1927.03.18
申请人
ELEKTROZEIT AKT.-GES.;EDUARD BLESSING
发明人
分类号
主分类号
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