Necessary Roughness

基本解释

Therefore, it is necessary to monitor variation of surface roughness microcosmically in the rainfall process.
因此，从微观上监测降雨过程中地表糙度的变化特征是十分必要的。
It also deals with the method of ensuring the insert point and angle that is necessary to mark surface roughness accurately under different conditions.
阐述了各种情况下准确标注表面粗糙度所需的插入点和角度的动态确定方法。
As roughness and form & position errors have an effect on evaluation result of cylinder diameters, it is necessary that roughness is filtered for evaluating cylinder diameters size.
针对表面粗糙度和形位误差对圆柱体直径评定结果的影响，在进行圆柱体直径尺寸评定时，需要对表面粗糙度进行滤波处理。