n. 棘轮, 棘爪
【机】 棘轮, 棘齿轮
在线英汉词典

ratchet的短语、例句：

ratchet n 1 device consisting of a toothed wheel or bar with a catch that fits between the teeth allowing movement in one direction only 棘轮机构. 2 (also `ratchet-wheel) wheel that forms part of this device 棘轮. =>illus 见插图.