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发明名称
Verfahren zum Telegraphieren mit Wechselstrom
摘要
申请公布号
DE669217(C)
申请公布日期
1938.12.19
申请号
DE1931A061499D
申请日期
1931.04.09
申请人
ALLGEMEINE ELEKTRICITAETS-GESELLSCHAFT
发明人
分类号
H04L27/04
主分类号
H04L27/04
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