Air cleaning units; Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air filtering installations; Air filters for air conditioning units; Air filters for domestic use; Air filters for industrial installations; Air purification units; Air purifiers; Air purifying apparatus and machines; Air purifying units for commercial, domestic, industrial, healthcare, cleanroom and power generation use; Filtering units for high efficiency particulate air cleaners for use in commercial, industrial, domestic air purifier systems; Filters and filtering devices for air and gas conditioning; Household air cleaners; Industrial air filter machines; Industrial air purifiers

'air':1,4,9,17,20,23,26,31,36,39,41,46,65,73,81,86,89,93 'apparatus':43 'clean':2,5 'cleaner':66,87 'cleanroom':54 'commerci':50,70 'condit':24,84 'contain':7 'devic':79 'domest':29,51,72 'effici':63 'filter':10,16,18,21,27,32,59,76,78,90 'gas':83 'generat':57 'healthcar':53 'high':62 'household':85 'industri':34,52,71,88,92 'instal':19,35 'light':12 'machin':45,91 'particul':64 'photocatalyt':15 'power':56 'purif':37 'purifi':40,42,47,74,94 'system':75 'ultraviolet':11 'unit':3,6,25,38,48,60 'use':30,58,68

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