... march. Its structure mainly includes: The motor, the tire baffle, the guidance board, the blade, the pulley, ... stretches, installed on the car, out of the tire back plate, then hangs the inner loop of ... knife cancels, after that the knife retracts in the tire back plate by the cylinder impetus, under ... depending upon the knife ,the cutting edge bead the tire. Advantages:1. The fixed blade uses the high ...