¦Õ650mm, ¦Õ500mm, ¦Õ450mm, rough rolling mill group, ¦Õ400mm rough rolling mill group and medium rolling mill group, ¦Õ320mm medium rolling mill group , ¦Õ300 medium rolling mill group , ¦Õ280mm, ¦Õ250 mm, ¦Õ220 finishing rolling mill group .(Note: all the groups include motor, speed reduction unit, link-up, guide rail, roller etc.)