Air purifying equipment, namely, charcoal carbon filters, chemical reaction filters, and catalytic filters, the foregoing being air filters for domestic use and industrial installations, not being for automobile motors and engines, or for automation equipment, or for medical ventilators

'air':1,17 'autom':34 'automobil':28 'carbon':6 'catalyt':12 'charcoal':5 'chemic':8 'domest':20 'engin':31 'equip':3,35 'filter':7,10,13,18 'forego':15 'industri':23 'instal':24 'medic':38 'motor':29 'name':4 'purifi':2 'reaction':9 'use':21 'ventil':39

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