名词
中文翻译：底部棘轮
同义词：
['bottom gear', 'bottom gear wheel']
例句：
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1.The car's engine is running smoothly, and the bottom ratchet wheel is working properly.
汽车的引擎运行平稳，底部棘轮工作正常。
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2. The mechanic adjusted the bottom ratchet wheel to ensure smooth operation of the transmission.
机械师调整了底部棘轮，以确保变速箱的顺畅运转。
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3. During maintenance, the technician replaced the worn-out bottom ratchet wheel with a new one.
在维护期间，技术人员用一个新的棘轮替换了磨损的底部棘轮。