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.
本论文开发的软件的主要功能是通过计算轧件在劈分孔型中的变形以及受力来确定轧件每个道次轧后断面形状从而设计出合理的孔型。
This dissertation can gain the size of profiled bar in any pass and design the proper pass by calculating the deformation and rolling-force of the steel in the pass .
该机适用于生产实心砖高孔洞率大断面各种孔型的空心砖。
This machine is used to produce . solid bricks and hollow bricks . great of holes and large section in all size of hole style .
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