dummy pass

• 空轧道次,不用孔型

dummy pass的用法和样例：

例句

1. It is pointes out to remove the scratch by adopting double circular pass guide rolls and using proper width steel strip.
   指出通过用双圆弧导向辊的孔型和采用合适的钢带宽度，才能够彻底消除焊缝边缘划痕这一现象。