ratchet-wheel

英['rætʃɪtw'iːl] 美['rætʃɪtw'iːl]
  • n.棘轮
  • driver n.驾驶员;司机;驱动器
  • ratchet n.棘轮;棘齿v.(使)渐进=rachet.
名词 ratchet wheel:
  1. toothed wheel held in place by a pawl or detent and turned by a lever