这个阶段的产品是横断面较小的半成品，如板坯、大钢坯、小方坯等。这些半成品适合于进一步轧制。
In this stage semifinished products with smaller cross sections are produced, such as slab, bloom or billet, which are suitable for further rolling.
在大圆钢轧制或大断面轧件延伸孔型系统中，双半径椭圆孔型与单半径椭圆孔型相比，具有轧件易咬入、变形较均匀、孔型磨损小等优点。
The double radius ellipse pass is better than the one of single radius ellipse in the big round bar or big section steel rolling.
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