line of roll forming

例句：

1. 1.The machine is designed to roll the materialinto a uniform thickness.
   这台机器设计用来将材料卷成均匀厚度。
2. 2. Rollforming is an important process in the productionof sheet metal products.
   卷制成型是生产板金属产品的重要工艺。
3. 3. The engineerused a special tool to roll forming themetal into the desired shape.
   工程师使用特殊工具将金属卷制成所需的形状。