Processing of oil; refining services; refining of natural gas; recycling of waste and trash; electricity generating; production of energy; purification of gases; purification of exhaust gases and smoke; treatment of hazardous gases; treatment of hazardous substances; rental of generators

Delivery of gas; transportation of natural gas; transport; transportation of crude oil; transport by pipeline; cargo ship transport; storage of gas; storage of crude oil; storage of hazardous materials; storage of oil; gas distribution; city gas supplying; gas supplying by plumbing; energy supplying; distribution of energy; electricity supplying; district heating supplying

Laying services for gas conduits; construction of gas storage tanks; construction of power plants; plumbing; installation of photovoltaic power generation installations; pipeline construction and maintenance; installation of gas chiller-heater; repair or maintenance of gas refrigerators; repair or maintenance of gas water heaters; repair or maintenance of gas water heater for household purposes; heating equipment installation and repair; repair or maintenance of gas alarm; repair or maintenance of gas leakage sensors; installation, maintenance and repair of apparatus for supplying gas; repair or maintenance of chemical processing machines and apparatus; repair of generators; oil and gas drilling; drilling of deep oil or gas wells

Electrical energy; fuel; petrol; liquid fuels; solid fuels; coal; gaseous fuels; producer gas; coal gas; liquefied petroleum gases; liquefied natural gas; fuel gas; solidified gases (fuel); oil-gas; gas for lighting; natural gas