roughness grade
... 表面粗糙度测量 surface roughness measurement 表面粗糙度等级 roughness grade 表面粗糙度仪 surface roughometer ...
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面向加工的表面粗糙度、精度等级、 公差等级等，通过造型特征识别转换得到。
Then, roughness, precision and tolerance for surface machining were obtained by transition of formative feature recognition.
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