DIN VDE 0891-6-1990 电缆和绝缘导线在电信设备和信息处理设备上的应用.符合DIN VDE 0816 1至3部分的室外电缆的特殊用法
Use of cables and insulated wires for telecommunication systems and information processing systems; special directions for external cables according to DIN VDE 0816 part 1 to part 3