Draft Document - Electrical installations for lighting and beaconing of aerodromes - Safety secondary circuits in series circuits - General safety requirements (IEC 97/233/CD:2021); Text in German and English
文件草案-机场照明和信标用电气装置-串联电路中的安全二次电路-一般安全要求(IEC 97/233/CD:2021);德语和英语文本