Classification of environmental conditions - Part 3-3: Classification of groups of environmental parameters and their severities - Stationary use at weatherprotected locations (IEC 60721-3-3:2019); German version EN IEC 60721-3-3:2019
环境条件分类.第3-3部分:环境参数组及其严重程度的分类.在受天气保护的位置固定使用(IEC 60721-3-3-2019);德国版本EN IEC 60721-3-3:2019