DIN EN 60811-504-2012 电缆和光缆. 非金属材料的试验方法. 第504部分:机械试验. 绝缘材料和护套的低温抗弯试验 (IEC 60811-504-2012); 德文版本EN 60811-504-2012
Electric and optical fibre cables - Test methods for non-metallic materials - Part 504: Mechanical tests - Bending tests at low temperature for insulation and sheaths (IEC 60811-504:2012); German version EN 60811-504:2012