DIN ETS 300019-1-3/A1:1998
设备工程学.电信设备环境条件和环境试验.第1-3部分:环境条件等级.固定用于气候防护场所.修改件1
Equipment engineering (EE) - Environmental conditions and environmental tests for telecommunications equipment - Part 1-3: Classification of environmental conditions; stationary use at weatherprotected locations; Amendment A1; English version ETS 300019-1