[Class : 35] Business Management And Business Administration Support; Administrative Support; Collecting, Storing And Obtaining Of Data And Information; Analysis Of Costs And Prices; Collecting And Systemization Of Information For Use In Databases, Marketing Studies And Research; Price Comparing Services; Sale Of Energy, Electrical Power, Hydro Power, Wind Power, Gas Power; Buying Of Energy, Electrical Power, Hydro Power, Wind Power, Gas Power; Services In Connection With Purchase And Sale Of Energy, Electrical Power, Hydro Power, Wind Power, Gas Power; Price And Cost Analysis";[Class : 37] Building Construction; Repair; Installation Services; Maintenance And Repair Related To Hydro Power, Wind Power, Gas Power Plants; Service Station Services; Construction Of Power Plants; Operation And Maintenance Services; Building Of Combustion Plants; Operation And Maintenance Of Power Plants; Building Construction; Building Services In Connection With Dam, Reservoir And Power Plants; Building, Installation, Repair And Treatment And Maintenance Of Thermal, Hydro Electrical And Nuclear Power Plants"[Class : 40] Production Of Electrical Power And Electricity; Production Of Remote Heating; Waste Burning; Production Of Electricity, Heat And Energy; Services Related To Production Of Energy; Cleaning Of Gas; Air Cleaning; Water Treatment; Destruction Of Waste And Trash; Combustion Of Waste And Trash"