84粗糙度参考标准器（Reference standard for roughness） 按照某种特定加工方法形成的表面纹理特征制造，且已知表面粗糙度参数的一个参考表面。
双语例句
1
The quantitative dependences of these numerical features on the fluctuant standard deviation and roughness of terrain are given, they provide the reference and basis for engineering designing.