定义
一种用于加工光学元件的打磨材料，如金刚砂，氧化铝，氧化硅，氧化铈，刚玉粉或氧化铁抛光粉等。磨料与抛光材料的不同主要体现在颗粒尺寸上。
English Expression
Abrasive
Definition
A material such as silicon carbide, aluminum oxide, silica, cerium oxide, emery or rouge that is used to figure, shape or finish optical elements. Abrasives differ from polishing materials mainly in particle size.