Railway applications - Fixed installations - Electric traction - Specific requirements for composite insulators used for overhead contact line systems (IEC 62621:2011); German version EN 62621:2016
铁路应用.固定装置.电力牵引.架空接触网系统用复合绝缘子的特殊要求(IEC 62621-2011);德文版EN 62621:2016