... alxe suited to china truck, steering axle, driving axle, trailer axle, full driven axle, front axle, double axle, man axle, steyr axle, used on howo, dlong, steyr, steyrking ... . Parking brake control device, 8. Front braker, 9. Middle axle braker, 10. Rear axle brake. 11. Double circuit brake system 12. Air dryer ...