The external size, quality, brake, handle-bar bell and night reflectors of a non-motor vehicle shall be in conformity with the safety and technical standards for non-motor vehicles.
非机动车的外形尺寸、质量、制动器、车铃和夜间反光装置，应当符合非机动车安全技术标准。
2
Fit the dial gauge with some preload and measure the lateral runout at the greatest external diameter of the brake disc.
在带有一定预载的情况下安装百分表，然后测量制动盘最大外径处的横向跳动。
3
Because the disc brake the brake torque is big, the stable property is reliable, the external dimensions are small, wear are small, widespread application on hoisting machinery equipment.