VDE 0468-721-2-4-2019 Classification of environmental conditions - Part 2-4: Environmental conditions appearing in nature - Solar radiation and temperature (IEC 60721-2-4:2018); German version EN IEC 60721-2-4:2018
Klassifizierung von Umgebungsbedingungen - Teil 2-4: Natuerliche Umgebungsbedingungen - Sonnenstrahlung und Temperatur (IEC 60721-2-4:2018); Deutsche Fassung EN IEC 60721-2-4:2018
Classification of environmental conditions - Part 2-4: Environmental conditions appearing in nature - Solar radiation and temperature (IEC 60721-2-4:2018); German version EN IEC 60721-2-4:2018 是非强制性国家标准,您可以免费下载前三页