1)circular scale,圆标度2)circular scale,圆形标度尺3)circular section,圆弧标度尺4)index of roundness,圆形度指标5)radius waviness,圆弧圆度6)circularity,圆，圆度
用法和例句
In lapping process, the end face run-out of grinding spindle is the lea- ding factor affecting the radius waviness and the radius of cutting edge, which are main parameters influencing the integrity of machining surface.