roundness tolerance的用法和样例：
例句
- An approximate quadratic curve has been found to suit the relationship between the tolerances of roundness and their logarithmic fatigue lives with given survivability.
在相同存活率下，孔的圆度公差与孔的对数疲劳寿命呈二次曲线关系。 - Radial run-out tolerance and axiality tolerance that often used in tolerance of form and position are positioning tolerance.
径向跳动公差与同轴度公差是形位公差项目中常用的位置公差。
