ratchetn.棘轮;棘齿v.(使)渐进=rachet.
ratchet chain棘轮链系
ratchet teeth棘轮齿
ratchet lever棘轮柄
ratchet tooth棘轮齿
ratchetdrivern.棘轮传动装置
ratchet hoist扳链手扳葫芦,环链手扳葫芦
ratchet brake棘轮制动器
ratchet shaft棘轮轴
ratchet effect棘轮
ratchet motion棘瓜装置