从基材上化学的或机械的方法移除涂层。
Chemical or mechanical method of removing the coating from the substrate.
最普通的精加工工序是用机械的方法，如研磨，磨削或用磨料。
The most common finishing operations are mechanical, such as milling, grinding, or polishing with abrasives.
如有必要，必须提供确保仅能从一个或多个事先确定的区域或位置控制机械的方法。
If necessary, means must be provided to ensure that the machinery can be controlled only from control positions located in one or more predetermined zones or locations.
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