40 Treatment of copper, zinc, nickel, gold, lead, silver and their ores and alloys; processing of copper ore, zinc ore, nickel ore, gold ore, lead ore, silver ore
6 Copper concentrate ore; copper ore; copper, unwrought or semi-wrought; zinc concentrate ore; zinc ore; zinc and its alloys; nickel concentrate ore; nickel ore; nickel
37 Mining extraction services; Construction of copper, zinc, nickel, gold, lead, and silver mines