Draft Document - Optical fibre cables - Part 3-12: Outdoor cables - Detailed specification for duct and directly buried optical telecommunication cables for use in premises cabling (IEC 86A/1989/CD:2020); Text in German and English
文件草案——光缆——第3-12部分:室外电缆——房屋布线用导管和直埋光纤通信电缆详细规范(IEC 86A/1989/CD:2020);德语和英语文本