ISO 11446-1:2012
道路车辆. 牵引车和挂车之间电气连接用连接器. 第1部分: 不用于交叉涉水的具有12 V标定电源电压的车辆用13极连接器
Road vehicles - Connectors for the electrical connection of towing and towed vehicles - Part 1: 13-pole connectors for vehicles with 12 V nominal supply voltage not intended to cross water fords