Mannesmann piercing mill

例句：

1. 1. The Mannesmann piercing mill is a criticalcomponent of the manufacturing process.
   曼内曼穿孔机是制造过程的一个关键组成部分。
2. 2.The new Mannesmann piercingmill has significantly improved efficiency in the productionline.
   新的曼内曼穿孔机在生产线上显著提高了效率。
3. 3. TheMannesmann piercing mill is used to producehigh-quality metal products for variousindustries.
   曼内曼穿孔机用于生产各种工业所需的高质量金属产品。