LST EN 60794-3-12-2013 光缆. 第3-12部分: 室外光缆. 房屋布线用管道光缆和直埋光学通信光缆的详细规范(IEC 60794-3-12-2012)
Optical fibre cables -- Part 3-12: Outdoor cables - Detailed specification for duct and directly buried optical telecommunication cables for use in premises cabling (IEC 60794-3-12:2012)