installation, repair, restoration, maintenance of air conditioning and ventilating apparatus; installation, repair, restoration, maintenance of apparatus for heating, purifying and cooling air

'air':6,22 'apparatus':10,16 'condit':7 'cool':21 'heat':18 'instal':1,11 'mainten':4,14 'purifi':19 'repair':2,12 'restor':3,13 'ventil':9

air-conditioning apparatus; air curtains, namely, hot and cold air blowers for room openings; air curtains in the nature of hot and cold air blowers used to create airstream for separation between external and internal climate environment in entrance or exit areas of buildings; air-conditioning, air cooling and ventilation apparatus and instruments; air purifying apparatus and machines; heating installations

'air':2,5,11,16,25,47,49,56 'air-condit':1,46 'airstream':30 'apparatus':4,53,58 'area':43 'blower':12,26 'build':45 'climat':37 'cold':10,24 'condit':3,48 'cool':50 'creat':29 'curtain':6,17 'entranc':40 'environ':38 'exit':42 'extern':34 'heat':61 'hot':8,22 'instal':62 'instrument':55 'intern':36 'machin':60 'name':7 'natur':20 'open':15 'purifi':57 'room':14 'separ':32 'use':27 'ventil':52

conducting technical project studies in the field of air conditioning, ventilating, cooling and heating apparatus

'air':9 'apparatus':15 'condit':10 'conduct':1 'cool':12 'field':7 'heat':14 'project':3 'studi':4 'technic':2 'ventil':11

WING AIR CURTAINS

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