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sprag

英 [spr?g] 美[spr?g]
  • n. 止輪墊（防止車子在斜坡往下滑）
  • vt. 用止輪木使…停下

英文詞源

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.

雙語例句

1. Roller bearing clutch is a new kind of frictional sprag clutch.
滾柱軸承離合器是一種新型的摩擦式超越離合器.

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