DIN EN 50306-4-2003 轨道交通.具备专门防火性能的铁路车辆电缆.薄壁.第4部分:多芯和多对电缆标准壁护套
Railway applications - Railway rolling stock cables having special fire performance; Thin wall - Part 4: Multicore and multipair cables standard wall sheathed; German version EN 50306-4:2002