第二，成套轴承在装配前经过严格的精密选配。不能互换使用锭脚型腔内的其它零件。
Second, the complete bearing undergoes the strict precise match before the assembly. Cannot exchange in the use spindle foot die space other components.
接着对深沟球轴承生产进行了调研，研究了6308轴承在生产、测量、选配及质检这几个方面，提出了产品升级的概念，选出加工质量较优的零件再进行选配。
The paper investigated NO. 6308 bearing in the areas of manufacturing, measuring, selective assembly and quality control. It put forward the concept of upgrade.
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