21/30387794 DC BS ISO 11795 AMD1 农用拖拉机驱动轮轮胎 滚动周长指数(RCI)和速度半径指数(SRI)的解释以及轮胎滚动周长的测量方法
BS ISO 11795 AMD1. Agricultural tractor drive wheel tyres. Explanation of rolling circumference index (RCI) and speed radius index (SRI) and method of measuring tyre rolling circumference