After the thickness, width, cnvexity and flatness of strip steel have been already cntrolled well, the edge drop problem of hot rolled strip has been paid attention to more and more.

• 热轧带钢生产技术对产品厚度、宽度、凸度和中直度已能较好地控制以后，带钢边部减薄（塌边缺陷）的问题越来越受到重视。