... .The main motor is driven by modelZ4-250-42,160kw DC motor2.Model ZLY250 speed reducer ,the ratio is 11.2:1 ... 3. Imported OL DC control device to dragButt welding machine1.Width : ≤300m ... rolling way ,reversed pneumatically(with 4kw 6classes motor)High-frequency1.Model:GP300-0.35-H2.Input power: 3P,380V,50HZ3.Output ...