ISO 7638-1:2003 道路车辆.牵引车和挂车的电气连接用连接器.第1部分:具有24V标称电源电压的车辆的制动系统和行驶系用连接器
Road vehicles - Connectors for the electrical connection of towing and towed vehicles - Part 1: Connectors for braking systems and running gear of vehicles with 24 V nominal supply voltage