11 Gas generation equipment, namely, electrochemical gas generators; gas generators, namely, electrochemical gas generators; laboratory electrochemical gas generators; gas generation components specially adapted for electrochemical gas generators, namely, filters for gas conditioning, hydrogen fuel cells, membrane filters, carbon molecular sieves, air compressors and catalyst chambers; solenoid control valves for regulating the flow of gases, motherboards and printed circuit boards (PCBs) for gas generators, all of the foregoing being integral parts specially adapted for electrochemical gas generators; automatic nozzles specially adapted for electrochemical gas generators; hydrogen generators; membrane apparatus for generating nitrogen; zero air generators in the nature of air purifiers; dry air generators in the nature of air purifiers; heat regenerators being heat exchangers, other than parts of machines; gas heat generators; electric air dryers; air purifying apparatus and machines; air filtering installations; air sterilisers; gas scrubbing apparatus and gas purification apparatus; gas purifying installations and apparatus; gas purification apparatus; gas concentrators in the nature of dryers for the removal of water vapor from compressed gases; fuel processors, namely, gas purification machines; steam generators; steam reformers being steamers for chemical processing; oxygen generators, namely, membrane apparatus for generating oxygen; electrochemical gas generators; heat pumps for gas generators; total organic carbon generators in the nature of air purifiers; gas regulators; regulating accessories for gas apparatus, namely, gas regulators; gas recovery apparatus, namely, gas recycling system comprised primarily of swing adsorption equipment for the recovery of gases in industrial applications; cooling installations for gas; gas chromatography apparatus for industrial use; chromatography apparatus for industrial purposes; filters for cleaning gases being parts of household or industrial installations, namely, filters for gas conditioning; electric fans for gas extractors; filters for gas extractors, namely, filters for gas conditioning; separators for purifying gas; replacement parts and fittings specially adapted for all of the aforementioned goods