词族 · sprag
词形变化
英语词源
- sprag (n.)
- "prop in a mine," 1841, of unknown origin. Transferred by 1878 to wood blocks, etc., used to brake motor vehicles. As a verb, from 1841. Related: Spragged; spragging.
权威例句
- 1. Roller bearing clutch is a new kind of frictional sprag clutch.
- 滚柱轴承离合器是一种新型的摩擦式超越离合器.