DIN EN 50085-2-1-2007 電氣裝置用電纜中繼系統和電纜導管系統.第2-1部分:用于墻壁和天花板安裝的電纜中繼系統和電纜導管系統
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