The paper contrastes and analysies the marking for the coarse degree ...

本文对新旧标准中表面粗糙度的标注进行了对比分。

By way of improving the superfinishing process,the appearance quality and surface roughness of steel balls,together with the productivity,were increased.

改进超精研加工工艺及加工程,提高了钢球的外观质量和表面粗糙度及生产效率,使该类承的性能和寿命有了进一步的提高。

Ballizing is a method of finishing on internal diameter.It can give improvement in dimensional tolerance, roundness and surface finish.

球推压法是一种内孔精整加工的方法,它能提高内孔的、状精度和改善表面粗糙度。

The coatings composed by the chosen refractory is crackfree in high temperature.The castings using the coatings is free of surface defect and the surface roughness can reach 18 - S.

根据此法选出的耐火材料所组成的涂料在高温急热时不开裂，浇注出的铸件表面无缺陷，表面粗糙度达18-S。