... by work roll,or support roll.Press-down adopts electric motor or AGC hydraulic.Technical parameters:Model450 rolling mill500 rolling mill550 rolling ... speedElectric(1-3m/s,4-6m/s);hydraulic(1.5-4m/s,4-8m/s)Electric(1-3m/s,4-6m/s ... );hydraulic(1.5-4m/s,4-8m/s)Electric(1-3m/s ... ,4-6m/s);hydraulic(1.5-4m/s,4-8m/s) Four ...