ETSI EN 300 119-4-2004 环境工程(EE).设备实际操作用欧洲远程通信标准.第4部分:杂项架/柜的子架的工程要求(版本2.1.1)
Environmental Engineering (EE); European telecommunication standard for equipment practice; Part 4: Engineering requirements for subracks in miscellaneous racks and cabinets (V2.1.1)