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发明名称
Koblingsanordning til Telefonanlæg med Vælgerdrift og Talestrømsforstærkere.
摘要
申请公布号
DK45453(C)
申请公布日期
1932.03.29
申请号
DKD45453
申请日期
1928.12.06
申请人
SIEMENS & HALSKE AKTIEN-GESELLSCHAFT
发明人
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主分类号
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