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Publication of DE257761CpublicationCriticalpatent/DE257761C/de
Verfahren zur Verminderung des zwischen Fernmeldeleitungen gleicher UEbertragungsrichtung ueber dritte Leitungskreise entstehenden doppelten Fernnebensprechens
Einrichtung zum Ausgleich der Netzschwankungen einer ueber einen Transformator an das Netz angeschlossenen Verbraucheranlage, insbesondere einer Roentgenanlage