名词
中文翻译：铁路平直机
同义词：
['rail straightener', 'rail straightening device']
例句：
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1. Therailway company has invested heavily in the developmentof new rail-straighteningmachines.
铁路公司对新型铁路平直机的开发投入了大量资金。
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2. The engineerused a rail-straightening machine to levelthe tracks before they were laid.
工程师使用铁路平直机在铺设轨道之前平整了它们。
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3. The rail-straightening machine is essential for maintaining thesmooth operation of trains.
铁路平直机对于保持火车平稳运行至关重要。