尽可能地提高汽车行驶速度，是提高运输生产率的主要技术措施之一，但必须以保证行驶安全为前提。近年来，由于车辆制造和道路建设水平的提高，汽车的行驶车速越来越高，要灵敏地减速或停车，必须具备可靠的制动系统，制动系统的核心部件是制动器。制动器是制动系中用以产生阻? As much as possible to improve the car speed, is to improve transport productivity, one of the major technical measures, but must ensure the driving safety as the prerequisite. In recent years, due to the improvement of vehicle manufacturing and road construction, the traveling speed of vehicles is getting higher and higher. To decelerate or stop sensitively, it is necessary to have a reliable braking system. The core of the braking system is a brake. Brake brake system used to produce resistance?