A rolling mill is used to form the material into various form such as round rod, square or rectangular bar.
A rolling mill is used to form the material into various form such as round rod, square or rectangular bar.
人们使用轧机把材料加工成各种形状，如圆棒材、方棒材和矩形棒材。
A rolling mill is used to form the material into various form such as round rod, square or rectangular bar.
人们使用轧机把材料加工成各种形状，如圆棒材、方棒材和矩形棒材。