DIN EN 300019-1-3:2004 设备工程(EE).电信设备的环境条件和环境试验.第1-3部分:环境条件的分类.抗大气影响场所用固定设备
Equipment Engineering (EE) - Environmental conditions and environmental tests for telecommunications equipment - Part 1-3: Classification of environmental conditions; Stationary use at weatherprotected locations (Endorsement of the English version EN 3000