Air-conditioning apparatus; Air-conditioning installations; Air humidifying apparatus; Electric air dryers; Heating apparatus for solid, liquid or gaseous fuels; Heating units for industrial purposes; Industrial dryers for heating and dehumidifying; Portable electric heaters; Space heating apparatus; Ventilating fans for commercial and industrial use

'air':2,6,9,13 'air-condit':1,5 'apparatus':4,11,16,39 'commerci':43 'condit':3,7 'dehumidifi':33 'dryer':14,29 'electr':12,35 'fan':41 'fuel':22 'gaseous':21 'heat':15,23,31,38 'heater':36 'humidifi':10 'industri':26,28,45 'instal':8 'liquid':19 'portabl':34 'purpos':27 'solid':18 'space':37 'unit':24 'use':46 'ventil':40

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