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.
例如，采用椭圆形钢管混凝土桥墩，相比圆钢管混凝土和矩形钢管混凝土，可以很有效地折减水流对桥墩的冲击作用。
For example, the piers using elliptical concrete filled steel tube (CFST), can more effectively reduce the impact acting on the piers, compared with piers using circular or rectangular CFST.
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