cone-roll piercing mill

例句：

1. 1. Thecone-roller is used to shapethe metal into a cylinder.
   圆锥滚压机用于将金属加工成圆柱形。
2. 2.The cone-roller is an essentialtool in the manufacturing process.
   圆锥滚压机是生产过程中不可或缺的工具。
3. 3. Thecone-roller isused to remove burrs andsmooth the surface of the workpiece.
   圆锥滚压机用于去除毛刺并平滑工件表面。