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- Mining of aluminium ores (bauxite) (2)
- Mining of lead and zinc ores (1)
- Mining of other non-ferrous metal ores, n.e.c. [titanium ( ilmenite and rutile) , niobium, tantalum, vanadium or zirconium ores; tin bearing ores; and, nickel, cobalt, tungsten, molybdenum, antimony and other non-ferrous metal ores] (1)