The Japanese Komatsu is currently in second place, the product is also very complete and the engine power has reached 29.5 kW to 858 kW. The most powerful of them, the D575A-3 SD, is the largest bulldozer in the world. Komatsu also produces its own bulldozer. The medium-sized bulldozer uses a hydraulic-mechanical transmission, and some bulldozer torque converters can implement automatic locking and a purely mechanical gearbox to improve the efficiency of the gearbox.