ratchet wheel是什么意思 ratchet wheel怎么读
ratchet wheel的英文翻译是什么意思，词典释义与在线翻译
Noun:- toothed wheel held in place by a pawl or detent and turned by a lever
ratchet wheel的用法和样例
用作名词 (n.)
- 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。 - 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。
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