IEC 60721-3-4 Ed. 3.0 b Cor.1:2023
IEC 60721-3-4 Ed. 3.0 b Cor.1:2023 Corrigendum 1 to Classification of environmental conditions - Part 3-4: Classification of groups of environmental parameters and their severities - Stationary use at non-weather protected locations
Amendment byInternational Electrotechnical Commission , 07/01/2023
