Railroad car is single section car, so microcomputer network system adopts two-stage control, does not have to adopt intricate Train-Bus that adopted by organize into groups car.
有轨电车为单节车辆，微机网络系统采用二级控制，不必采用编组运行车辆所采用的较复杂的列车总线。
3
The rammed car is a kind of large-scale road maintenance machinery in railroad, and its electricity section shoulders the control tasks of all the works and is the cerebrum of the vehicle.