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

本文对新旧标准中表面的标注行对比分析。

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

通过改超精研加工工艺及加工过程,提高钢球的外观质量和表面及生产效率,使该类承的性能和寿命有步的提高。

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

球推压法是种内孔精整加工的方法,它能提高内孔的尺寸、形状精和改善表面。

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，表面达18-S。