Product Description. Brief introduction for Steel Mill Transfer Car Bogie From Smelter Plant to Cast House. This kind of steel mill transfer car is powered by the mobile cable which conducts AC 380v directly into the electrical control system of the transfer car to let it start, stop, go forward and backward, speed up and slow down and so on. This steel mill transfer car can be used both on the "s"and arc-shaped railways,the mobile cable is placed between two rails.