表面粗糙度比较样块是用比较法检查零件表面粗糙度的一种量具，在机械工业生产中得到广泛的应用。
The surface roughness comparison specimens are used to calibrate the surface roughness of work pieces by comparison. They are widely used in machinery industry.
表面粗糙度比较样块是用比较法检查零件表面粗糙度的一种量具，在机械工业生产中得到广泛的应用。
The surface roughness comparison specimens are used to calibrate the surface roughness of work pieces by comparison. They are widely used in machinery industry.
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