9 Boiler control apparatus, namely, process controllers, and boiler control instruments; apparatus for the control and analysis of gas flue, namely, gas-flue controllers and computer programs for gas flue analysis
11 Steam boilers; marine boilers; hot water boilers; thermal oil boilers; industrial boilers; boiler pipes and tubes; boiler feed water installations, boiler fuel feed installations; heat exchangers for oil, water and steam cooling, heating and evaporation; filters for boilers sold as part of boiler installations; flue-gas filters sold as part of boiler installations
37 Boiler services, namely, building, installation maintenance and repair