[Class : 1] Gas Purifying Preparations; Gases For Industrial Purposes[Class : 4] Fuels; Liquid Or Gaseous Fuels; Gas In Liquid, Compressed Or Gaseous Form; Solidified Gas[Class : 6] Containers Of Metal For Compressed Gases Or Liquid Fuel[Class : 11] Gas Boilers; Gas Burners; Gas Generators; Gas Pipes[Class : 39] Supply, Distribution, Transportation And Storage Of Gas