... transportation wagon 1.ISO9001,SGS,CE 2.material:steel 3.DC motor 4.Transfer cargoes or equipments China made transportation wagon ... power from storage battery in the wagon.The DC control system controls the DC motor turn positively, negatively, which drives the gear ... the speed and so on.2. Main partsSteel frame, the electric motor, gear reducer, wheel,electrical appliance box, battery, charger, Shaft ...