Machines for producing and distributing acid, namely, coolers, absorption towers, drying towers, stripping towers, heat exchanges, pump tanks, strainers, condensers, all for use in acid distribution systems of industrial plants

Pipes and tubes of metal; iron ores; stainless steel and their alloys produced in the form of rods, pipes, tubes, sheets, plates, wires, welding wire, steel bars, slabs, billets, strips and foils