4
Gaseous and liquid fuels and fuel mixtures, namely fuel gas, natural gas, coal gas, bio-gas, namely, gas made from agricultural products and animal waste; fuels, in particular biofuels, biodiesel fuel, ethanol fuels and bioethanol fuels
7
Electricity generators, namely generating sets; internal combustion motors, except motors for land vehicles, for machine operation; turbines other than for land vehicles; block-type thermal power stations for power generation; turbines for air vehicles
11
Biogas based power plants, biodiesel based power plants and ethanol based power plants; installations for generating heat; heating boilers, steam boilers
12
Turbines for land vehicles; fuel-driven land vehicles; motors for land vehicles
37
Building construction; building, construction, repair and maintenance of biogas installations, of biodiesel installations, of ethanol installations, of electricity-generator units and of heat generation installations; construction planning of engineering constructions, of biogas installations, of biodiesel installations, of ethanol installations, of generator units, of installations for generating heat, of service stations and of power stations
39
Transmission and distribution of energy, of heat, of electricity and of gas
40
Processing, namely refining of oil; generation of energy, of heat, of electricity, of gas, of propellants and of biofuels; electricity generation
42
Engineering drawing, in particular the surveying of engineering constructions, design and technical planning of engineering constructions, of biogas installations, of biodiesel installations, of ethanol installations, of generator units, of installations of generating heat, of service stations and of power stations
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