DIN EN IEC 63013/A1 E:2021
文件草案 LED 封裝 長期發(fā)光和輻射通量維持預(yù)測(IEC 34A/2233/CDV:2021) 德文版和英文版 EN IEC 63013:2019/prA1:2021
Draft Document - LED packages - Long-term luminous and radiant flux maintenance projection (IEC 34A/2233/CDV:2021); German and English version EN IEC 63013:2019/prA1:2021