Base metals and their alloys namely, unwrought and partly wrought common metals and their alloys in the form of billets, pipe, tubes, rods or blanks for further manufacturing; steel; metal construction materials namely, metal tubes and pipes, bars and solid rods, profiles, girders, metal sheets, fittings, shores, supports and braces for construction of wells, platforms, and oil field and offshore rig structures; metal transportable constructions namely, metal tubes and pipes bars, solid rods,...