equivalent roughness coefficient 当量粗糙度系数 ; 等值糙率系数

equivalent uniform roughness 等效均匀粗糙度

equivalent roughness length 等效粗糙长度

Roughness equivalent 相当糙率

equivalent road roughness 等价路面粗糙度

equivalent Absolute roughness 当量绝对粗糙度

equivalent relative roughness 当量相对粗糙度

equivalent sand grain roughness 当量砂径糙率