Extraction of natural resources; mining extraction; drilling; excavating; quarrying services; mining of metal, precious metals and associated raw materials; nickel mining; treatment of metals, precious metals, and associated raw materials; metalworking; treatment of metals, namely, brazing, casting, coating, cutting, finishing, forging, hardening, laminating, melting, moulding, plating, polishing, pressing, processing, refining, rolling, stamping and tempering; extruding of metal alloys; nickel smelting, refining and processing; nickel production services; information, advisory, consultancy and regulatory services relating to the aforesaid services