名词
中文翻译：铁轨替换器同义词
同义词：
['rail jack', 'rail renewer']
例句：
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1. The railway company is replacing the old rails with new ones.
铁路公司正在用新的铁轨替换旧的。
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2. The engineer used a rail replacer to fix the damaged track.
工程师使用一个铁轨替换器来修复损坏的轨道。
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3. The train was delayed due to a rail replacer failure.
由于铁轨替换器故障，火车延误了。