Machines, installations and equipment for processing ferrous materials, namely, plant for pneumatically transporting and injecting powdered material into furnaces, steel desulphurization units, iron desulphurization units, iron desiliconization units, and iron dephosphorization units; machines, installations and equipment for steel-making, namely, plant for pneumatically transporting and injecting powdered material into furnaces, steel desulphurization units, iron desulphurization units, iron...