名词
中文翻译：机车阀门齿轮
同义词：
['locomotive gear', 'locomotive valve', 'locomotive gear assembly']
例句：
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1. The locomotives are equipped with advanced valve gears to ensure smooth operation.
这些机车装备了先进的阀门齿轮，以确保运行平稳。
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2.The engineer inspected the locomotives' valve gears for any signs of wear and tear.
工程师检查了机车的阀门齿轮，以查看是否有磨损的迹象。
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3.The locomotives' valve gears are crucial components in maintaining the train's efficiency.
机车的阀门齿轮是保持列车效率的关键部件。