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注行了对比分析。

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整加工法,它能提高内孔尺寸、形状度和善表面粗糙度。

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

通过研加工工艺及加工过程,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一步提高。

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.

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