DIN EN 60998-2-4-2006 家用和类似用途低压电路连接器件.第2-4部分:扭接式连接器件的特殊要求
Connecting devices for low voltage circuits for household and similar purposes - Part 2-4: Particular requirements for twist-on connecting devices (IEC 60998-2-4:2004, modified); German version EN 60998-2-4:2005