... drive is used full digital inverter speed control system of SIEMENS;7. Main control system: process control, speed control, ... auto-control, liquor level control, fault alarm, production list and temperature of furnace auto-control;8. Discharging of ... rolling mill, skin pass mill, tension leveling line, bright annealing line, electrolytic tinning line, galvanized line and so on. For more information, ...