bolting machine

例句：

1. 1. The new rolling mill is expected to significantly improve production efficiency.
   新轧钢机预计将显著提高生产效率。
2. 2.The rolling mill is the heart of the steel industry, responsible for shaping raw materials into finished products.
   轧钢机是钢铁工业的核心，负责将原材料加工成成品。
3. 3. The rolling mill is a complex piece of machinery that requires regular maintenance to ensure its optimal performance.
   轧钢机是一种复杂的机械设备，需要定期维护以确保其最佳性能。