The quality of steel ball's surface is very important to use of mechanical bearing, so it is necessary to inspect steel ball's appearance all around.
钢球表面质量，是关系到轴承使用性能的重要环节，在生产中需要对钢球的外观进行百分百的监测。
The quality of steel ball's surface is very important to use of mechanical bearing, so it is necessary to inspect steel ball's appearance all around.
钢球表面质量，是关系到轴承使用性能的重要环节，在生产中需要对钢球的外观进行百分百的监测。
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