roughness grade ; roughness grade number
... 粗糙度(表面) roughness 粗糙度等级 roughness grade number 粗糙度高 roughness height ...
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表面粗糙度等级 roughness grade
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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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