DIN VDE 0278-631-4:2009 电缆.附件.材料特性.第4部分:低压和中等电压设施低于20,8/36 (42) kV用冷收缩部件的"指纹"识别
Electrical cables - Accessories - Material characterisation - Part 4: Fingerprinting for cold shrinkable components for low and medium voltage applications up to 20,8/36 (42) kV; German version HD 631.4 S1:2008