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表面粗糙度样板具有平面形以及圆柱凸形或凹形工作面。按照参考文献,测定样板 Ra 参数是用各种 A1型轮廓仪,其中也括252型轮廓仪来进行。上述轮廓仪中的置物台结构能使被检样板
The surface roughness template has a planar shape and a cylindrical convex or concave face. According to the reference, the Ra plate parameters were determined using a variety of Type A1 profilometers, including the Model 252 Profiler. The configuration of the stage in the profiler enables the test specimen to be tested