你可以通过球的滚动发现台球桌并非水平。
You could tell that the pool table wasn't level by the way the balls rolled.
通过球磨混料法来解决各相的分散性问题。
Mixture through the ball milling method to make it uniform dispersion.
转向节通过球头节与安装在车架上的上下控制臂相连。
The steering knuckle then supported through Ball joints, by upper and lower control arms which are attached to the car frame.
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