cold rolling mill 1.main craft of the course: 1)The rolling millmakes the steel bar stainlessbefore the bar pulled into the cold rolling mill , 2)then reduce the diameter. 2.advantage of the deruster: the derusterhas a high efficiency and low noise. 3 We have another kind of machining steel bar : 1)at first reducesthe hot-rolledribbed bars diameter by cold rolling, 2)processing crescent ribbed bars on three sides of the surface. 4 The raw materialof thesecold rolling mills is 6mm 12mm. the specifications of the products is 5mm 11mm. The productions all reach national standard. The final productions are3 ribs of deformed reinforced steel bars.