... ; 450mm, rough rolling mill group, Φ 400mm rough rolling mill group and medium rolling mill group, Φ 320mm medium rolling mill group, & ... groups include motor, speed reduction unit, link-up, guide rail, roller etc. )II. Rolling steel products: I-bar, angle bar, ... the equipment; Process design and products design of steel rolling etc. Various technical design. 3. Dispatching various technical ...