As for flat roll of F4 ~ F6 stands, their pre-grinding crowns were optimized and the flatness of strips was greatly improved.
对F4 ~F6机架平辊的预磨凸度进行优选，明显改善了带钢的平直度。
As for flat roll of F4 ~ F6 stands, their pre-grinding crowns were optimized and the flatness of strips was greatly improved.
对F4 ~F6机架平辊的预磨凸度进行优选，明显改善了带钢的平直度。
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