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voice-frequency telegraphy
commun., el. audiofrequente telegrafie; meervoudige toon-telegrafie; meervoudige toonfrequentie-telegrafie
commun., IT spraakfrekwentie telegrafie
voice frequency telegraphy
commun. wisselstroomtelegrafie f
voice-frequency telegraphy: 9 phrases in 2 subjects
Communications5
Electronics4