There is a video of a track car with sliding contact line power supply and annealing furnace supporting the track car in the factory
The KPC series electric track flatbed has the advantages of safety, simple structure, adjustable speed, low noise, low cost, easy operation, and easy maintenance. Due to the simple structure of the sliding contact line electric flatbed, the requirements for track laying are not high, making it suitable for high-frequency applications. The disadvantage is that it is only suitable for medium to short distance transportation.