Class 040
Treatment & Processing of Materials Services
Production of energy; processing and transforming of energy; production and processing of fuels and of other sources of energy; consultancy in the field of energy generation; refining services; refining of natural gas; fuel refining; gas production services; generation of gas and electricity; gas processing services; processing of fuel materials; gas compression services; purification of gases; treatment of hazardous gases; treatment of hazardous liquids; treatment of hazardous substances; air purification.