ratchet
'rætʃit
基本解释
n. 棘轮, 棘爪
[机] 棘轮, 棘齿轮
英文释义
n. mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction
v. move by degrees in one direction only
词形变化
上一个单词：ratchel
下一个单词：ratchet arrangement