Air filtering apparatus, namely, air filters for domestic use, air filters for industrial installations; air purifying apparatus; air cleaning filters being parts of air cleaning machines or installations; filters being parts of household or industrial installations for air filtering; filters for cleaning air; filters for cleaning gases being parts of household or industrial installations; filters for waste gas purification

'air':1,5,10,15,18,24,38,43 'apparatus':3,17 'clean':19,25,42,46 'domest':8 'filter':2,6,11,20,29,39,40,44,55 'gas':58 'gase':47 'household':33,51 'industri':13,35,53 'instal':14,28,36,54 'machin':26 'name':4 'part':22,31,49 'purif':59 'purifi':16 'use':9 'wast':57

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