针对310乙字钢因950轧机出钢扭转造成的轧疤缺陷问题，改进孔型形状与配置角度，消除了因950轧机出钢扭转造成的轧疤缺陷，轧疤缺陷废品率下降了0.78%。
The view of rolling scar defect of 310 zee bars, the groove section and collocation angle were improved, the rolling scar defect was eliminated, and the rate of the rolling scar waster had been decreased by 0.78%.
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