Trackless Transfer Cart. Trackless electric flat car, also known as electric flat car, trackless transport trolley, wheel carrier, is a kind of can by artificial control any steering wheel handling equipment, because it USES the high strength of polyurethane rubber wheel as the drive wheels and bearing wheel, got rid of the dependence on the ground rail to rail cars, no damage to infrastructure, can walk in the ground, optional steering without being limited by the space and ground, can