The traditional blade of nodular iron can not meet needs of new cold roller along with accelerating the speed of modern cold-rolled strip mill,their shortcomings are solved by design of rolling blade.

• 随着现代冷轧带钢轧机线速度的加快,传统的球墨铸铁卫板不能适应冷轧机的需要,设计的滚动卫板解决了传统卫板的缺陷。