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

本文对新旧标准中表面粗糙度标进行了对比。

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.

据此法选出耐火材料所组成涂料在高温急热时不开裂，浇出铸件表面无缺陷，表面粗糙度达18-S。

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方法,它能提高内孔尺寸、形状精度和改善表面粗糙度。

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

通过改进超精研艺及过程,提高了钢球外观质量和表面粗糙度及生产效率,使该类轴承性能和寿命有了进一步提高。