介绍了抛(喷)丸、喷砂表面粗糙度比较样块国家标准的制订原则及过程;粗糙度的评定基准、取样长度及评定长度,评定参数及评定方法的选择;粗糙度在图样上标注的代(符)号及标注方法,样块的粗糙度参数及样块分组,粗糙度母模样块的试验研究及标准样块的研制;标准的应用范围及其技术经济效益。 The principles and process of national standards of throwing (shot) pellets and sandblasting surface roughness samples are introduced. The criteria of roughness, the length and length of samples, the evaluation parameters and the selection of evaluation methods are introduced. The roughness is marked on the patterns The generation (symbol) number and marking method, the sample roughness parameters and sample grouping, the roughness of the mother model sample research and development of standard samples; standard application scope and technical and economic benefits.