Полный русско-английский словарь
тональное телеграфирование
Frequency signaling, harmonic signaling, in-band signaling, harmonic telegraphy, tone telegraphy, voice-frequency telegraphy
Полный русско-английский словарь
Frequency signaling, harmonic signaling, in-band signaling, harmonic telegraphy, tone telegraphy, voice-frequency telegraphy