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发明名称
UEbertragungssystem fuer den Mehrfach-Traegerfrequenzbetrieb in Vierdrahtschaltung ueber Fernmeldekabel mit sternverseilten Vierern
摘要
申请公布号
DE697173(C)
申请公布日期
1940.10.15
申请号
DE193301S9401D
申请日期
1933.05.19
申请人
SIEMENS & HALSKE AKT.-GES.
发明人
FISCHER ERNST
分类号
H04J1/12
主分类号
H04J1/12
代理机构
代理人
主权项
地址
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