Its quality, appearance, surface treatment and have the imported products compared to the strength.
其质量、外观、表面处理都具备和进口产品相比较的实力。
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 film quality is good, the appearance is gray, the phosphating film surface does not have the ash and the white phenomenon.
膜层质量好，外观呈灰色，磷化膜表面无挂灰、返白现象。
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