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发明名称
Schaltungsanordnung fuer Fernsprechanlagen mit Haupt- und Unteraemtern
摘要
申请公布号
DE724389(C)
申请公布日期
1942.09.04
申请号
DE1940S142115D
申请日期
1940.08.31
申请人
SIEMENS & HALSKE AG.
发明人
DREYER HANS
分类号
H04Q3/58
主分类号
H04Q3/58
代理机构
代理人
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地址
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