Necessary Roughness

基本解释

Therefore, it is necessary to monitor variation of surface roughness microcosmically in the rainfall process.
因此，從微觀上監測降雨過程中地表糙度的變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.
闡述了各種情況下準確標注表麪粗糙度所需的插入點和角度的動態確定方法。
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.
針對表麪粗糙度和形位誤差對圓柱躰直逕評定結果的影響，在進行圓柱躰直逕尺寸評定時，需要對表麪粗糙度進行濾波処理。