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发明名称
Schaltungsanordnung zur rueckwaertigen Sperrung handbedienter, durch UEbertrager abgeriegelter Verbindungsleitungen
摘要
申请公布号
DE489577(C)
申请公布日期
1930.01.18
申请号
DE1927T033949D
申请日期
1927.08.31
申请人
TELEPHON-APPARAT-FABRIK E. ZWIETUSCH & CO. G.M.B.H.
发明人
分类号
H04M5/08
主分类号
H04M5/08
代理机构
代理人
主权项
地址
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