方法：用游标卡尺等，对成都地区125套成人干燥椎骨的椎体进行测量。
Specificaton for gauge blanks - Plug, ring and calliper gauges
量规坯件规范.塞规、环规与卡规
1·The expanding spring brake-piston damping plates and brake calliper fastening screws must be replaced whenever the brake pads are changed.
更换制动片时，应同时更换扩张弹簧、制动活塞减震板和制动卡钳紧固螺钉。