ratchet pawl

例句：

1. 1. The car's steering wheel has a ratchet pawl for easy adjustment.
   这辆车的方向盘有一个棘轮，便于调整。
2. 2. The engineer used a pawl to secure the bolt in place.
   工程师用一个棘爪固定螺栓到位。
3. 3.The tool had a ratchet pawl that could be easily released by hand.
   这个工具有一个棘爪，可以很容易地手动释放。