ratioless无比率
ration.比率;比例
ratio of benefit to loss正负效益比
ratio of manure to straw粪秆配比
ratio of punching-span冲跨比
ratio of residual arrays筛留组的比度
ratio of length to width长宽比
ratio of width to length宽长比
ratio differential relay比率差动继电器
ratio convergence method比值收敛法
ratio content percentage含油率
ratio of mica processing云母出成率