ratchet wheel

• n. [机]棘轮

英英释义

Noun:

1. toothed wheel held in place by a pawl or detent and turned by a lever

例句

用作名词 (n.)

1. A ratchet allows a heavy weight to be raised in short successive stages.
   棘轮可在简短连续的步骤内就把一个重物抬高。
2. As the piston descended, a ratchet engaged the piston rod and engine shaft and thus power was transmitted.
   当活塞下行时，棘轮连接活塞杆和发动机轴，因此将功率输送出去。