abrasion

abrasion的解释
n. 磨减,磨损,磨损之处
abrasion的例句
An implement with cutting edges or a pointed end for boring holes in hard materials, usually by a rotating abrasion or repeated blows; a bit.
钻带切割刃或尖端的工具，用于在坚硬材料上钻孔，一般靠旋转磨损或反复击打实现钻孔

A minor scratch or abrasion.
擦伤一个轻微的擦伤或磨损