Water heaters; Heating apparatus, namely, floor heating apparatus, space heating apparatus; Heaters for heating irons, namely, ironing tables that generate steam for ironing; Evaporators for air conditioners, evaporators for chemical processing; Water heaters, namely, hot water tanks; Stills not for scientific purposes; Germicidal lamps for purifying air; Air-reheaters in the nature of heat exchangers not being parts of machines; Air conditioning installations; Air filtering installations

'air':26,47,49,62,65 'air-reheat':48 'apparatus':4,8,11 'chemic':30 'condit':63 'condition':27 'evapor':24,28 'exchang':56 'filter':66 'floor':6 'generat':20 'germicid':43 'heat':3,7,10,14,55 'heater':2,12,33 'hot':35 'instal':64,67 'iron':15,17,23 'lamp':44 'machin':61 'name':5,16,34 'natur':53 'part':59 'process':31 'purifi':46 'purpos':42 'reheat':50 'scientif':41 'space':9 'steam':21 'still':38 'tabl':18 'tank':37 'water':1,32,36

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