Common metals and their alloys; General purpose storage containers of enameled steel; enameled and non-enameled metal storage tanks; General purpose enameled storage containers of metal or steel; General purpose non-enameled storage containers of metal or steel; steel pipes; steel sheets; steel tubes; steel alloys; metallic built-in parts for general purpose enameled storage containers of metal, namely glass-lined stirrer shafts, glass-lined heat exchangers, glass-lined pump control valves, g...