The steel shot is round, and the cut shot is cylindrical. In the process, the steel shot is cast, so the particle size is uniform. Hit the ground to form a round pit. The advantage of throwing is that the damage to the equipment is small, the workpiece is beautiful, and the efficiency is lower than that of cutting the shot; the cutting of the shot is similar to scraping, like a knife, the advantage is high efficiency, but the thrown workpiece has scratches , great damage to the equipment .