Insulators - Tests on indoor post insulators of organic material for systems with nominal voltages greater than 1 kV up to but not including 300 kV (IEC 60660:1999); German version EN 60660:1999
绝缘子.标称电压大于1 kV但不包括300 kV的系统用有机材料室内支柱绝缘子的试验(IEC 60660-1999);德文版EN 60660:1999