medium section mill

例句：

1. 1. The medium section mill is usedto process materials with a thickness of upto 30 mm.
   中段轧机用于处理厚度达30毫米的材料。
2. 2.The medium section mill is an essential toolfor the metalworking industry.
   中段轧机是金属加工行业不可或缺的工具。
3. 3. The mediumsection mill is used to produce sheet metalproducts with high precision and efficiency.
   中段轧机用于生产高精度和高效率的板材产品。