THINK BIG

Industrial oils, crude oil, diesel oil, petroleum ether, petroleum (raw and refined); natural and synthetic fuel gases, coal, coke, coal naphtha and coal tar oil

Common metals and their alloys, unwrought or semi-wrought; ferroalloys; ores of metal

Drilling of wells; drilling of oil wells; drilling of gas wells; oil drilling; mining extraction; mining services

Treatment of common metals, treatment of precious metals, treatment of metallic ores, treatment of petroleum, treatment of gas, treatment of coal, treatment of industrial oils, treatment of crude oil, treatment of metal alloys and treatment of chemicals; processing and treatment of ores and metals; processing and refining of oil and gas; extraction of metals from minerals

Gas, oil, petroleum, minerals and coal exploration, exploration of oilfields and gas fields, drilling of wells (geological prospecting), oil and gas prospecting; oil-field exploitation, oil-field surveys, oil well testing; mining, coal, ore and metals prospecting and mine exploitation