表面粗糙度标注新旧标准的区别

The Difference Between New and Old Standard on Surface Roughess Indicating

从ＧＢ／Ｔ１３１－９３《机械制图表面粗糙度符号、代号及其标注》国家标准的宣贯出发，对新旧国家标准的不同之处进行了分析。

For advertising and lmplementing National Standard/Recommend 131-93《Mechanical drawings surface roughness marks、symbols of lndicating》,This paper was analysed the difference betwee National Standard/Recommend 131-93《Mechanical drawings surface roughness marks、symbols and methobs of indicating》and National standard 131-83《mechanical drawings surface roughness symbols and methods of indicating》.