rail-finishing mill

例句：

1. 1. The railway company has invested in a new rail-finishing mill to improve the quality of its products.
   铁路公司投资了一个新的铁路精整机，以提高其产品的质量。
2. 2. The rail-finishing mill is essential for the maintenance and repair of railway tracks.
   铁路精整机对于铁路轨道的维护和修理至关重要。
3. 3.The rail-finishing mill is used to remove rust and other impurities from the rails before they are sent out into the market.
   铁路精整机用于在将铁轨送往市场之前，去除铁轨上的锈和其他杂质。