DIN EN 50085-2-1-2007 电气装置用电缆中继系统和电缆导管系统.第2-1部分:用于墙壁和天花板安装的电缆中继系统和电缆导管系统
Cable trunking systems and cable ducting systems for electrical installations - Part 2-1: Cable trunking systems and cable ducting systems intended for mounting on walls and ceilings; German version EN 50085-2-1:2006