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发明名称
Schaltungsanordnung fuer Fernsprechanlagen mit Haupt- und Unteraemtern
摘要
申请公布号
DE713292(C)
申请公布日期
1941.11.06
申请号
DE1939S138990D
申请日期
1939.10.27
申请人
SIEMENS & HALSKE AKT.-GES.
发明人
DREYER HANS
分类号
H04Q3/58
主分类号
H04Q3/58
代理机构
代理人
主权项
地址
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