M.810 FRENCH-1988 SETTING UP AND LINING UP AN INTERNATIONAL VOICE-FREQUENCY TELEGRAPH LINK FOR PUBLIC TELEGRAPH CIRCUITS (FOR 50@ 100 AND 200 BAUD MODULATION RATES)
SETTING UP AND LINING UP AN INTERNATIONAL VOICE-FREQUENCY TELEGRAPH LINK FOR PUBLIC TELEGRAPH CIRCUITS (FOR 50@ 100 AND 200 BAUD MODULATION RATES) 是非强制性国家标准,您可以免费下载前三页