糙米与白米均产自于同一种作物，只是白米经过了精加工，研磨掉了更多的外壳。
Brown and white rice both come from the same plant - but white rice is more highly processed, with more layers stripped away.
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.
目前有平面磨床，内外圆磨床，无心磨床，双平面研磨机，机械钻石抛光等设备，基本满足了对陶瓷的精加工。
Precision processing of ceramics is basically achieved equipped with surface grinder, internal and plain grinder, centerless grinder, biplanar grinder, mechanical diamond polisher, etc.
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