7310: Tank, cask, drum can, boxes & sim contr, cap</=300l, (excl liq/compr

731010: Tanks, casks, drums, cans, boxes & sim contr, i or s, capac >/=50L bu 731021: Cans, iron o steel, cap <50 litres, to be closd by crimpg o soldering 731029: Cans, iron or steel, capacity <50 litres nes 7310: Tank, cask, drum can, boxes & sim contr, cap</=300l, (excl liq/compr