ISO 13044-2:2021
道路车辆. 重型商用汽车组合用24 V全自动耦合系统(FACS). 第2部分: 50 mm备用轮耦合的电气和气胎接口
Road vehicles - Fully automatic coupling systems 24 V (FACS) for heavy commercial vehicle combinations - Part 2: Electrical and pneumatic interface for 50 mm fifth wheel couplings