ratchet gear

• 棘轮

ratchet gear的用法和样例：

例句

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。