Petroleum products, fuel, electricity and other sources of energy09000000-3Petroleum products, fuel, electricity and other sources of energy
Fuels09100000-0Fuels
Solid fuels09110000-3Fuels
Coal and coal-based fuels09111000-0Fuels
Coal09111100-1Fuels
Coal-based fuels09111200-2Fuels
Hard coal09111210-5Fuels
Briquettes09111220-8Fuels
Fossil fuels09111300-3Fuels
Wood fuels09111400-4Fuels