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发明名称
Anordnung zum Einschalten bzw. Abtrennen eines Verstaerkers in eine bzw. aus einer UEbertragungsleitung fuer Sprech- und Signalstroeme
摘要
申请公布号
DE531894(C)
申请公布日期
1931.08.19
申请号
DE1927S081320D
申请日期
1927.08.24
申请人
SIEMENS & HALSKE AKT.-GES.
发明人
BRECHELT WILHELM
分类号
H04M3/40
主分类号
H04M3/40
代理机构
代理人
主权项
地址
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