| 词条 | abrasive |
| 释义 | abrasive n. 研磨剂adj. 研磨的 (1) A hard substance used for grinding , honing , lapping , superfinishing , polishing, pressure blasting, or barrel finishing . Abrasives in common use are alumina, silicon carbide, boron carbide, diamond, cubic boron nitride, garnet, and quartz. (2) Hard particles, such as rocks, sand, or fragments of certain hard metals, that wear away a surface when they move across it under pressure. See also superabrasives . |
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