阐述了目前市场急需的高质量重轨必须实现高精度轧制，我国现有重轨厂采用二辊孔型轧制难以满足要求。
The high quality heavy rail must be produced by high precision rolling technology. The conventional technology of 2-h mill adopted in our country is difficult to produced it.
一般而言，钢板桩由带孔型轧辊的二辊轧机轧制而成，而且必须多孔型轧制。
Generally speaking, sheet pile is rolled by grooved rolls on the 2 Hi mills and many grooves are necessary to roll it.
在用水平二辊连轧机轧制中，椭圆轧件进入圆孔型翻转时易出现错辊、导卫装置损坏、轧件划伤等一系列问题。
A serials of problems of miss position of roll, easy damage of guide and guard, scuff mark of piece were common during oval piece entering round pass by 2-h horizontal mill.
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