DIN EN 300019-1-7-2004 设备工程(EE).电信设备的环境条件和环境试验.第1-7部分:环境条件的分类.便携设备和非固定使用设备
Equipment Engineering (EE) - Environmental conditions and environmental tests for telecommunications equipment - Part 1-7: Classification of environmental conditions; Portable and non-stationary use (Endorsement of the English version EN 300019-1-7 V2.1.4