Heat exchangers not being parts of machines, refrigerators, air conditioners, evaporative air cooling units for industrial use, dehumidifiers, ventilators for industrial use, ventilating exhaust fans, and air filters and louvers for use with ventilators for industrial use

'air':9,12,27 'condition':10 'cool':13 'dehumidifi':18 'evapor':11 'exchang':2 'exhaust':24 'fan':25 'filter':28 'heat':1 'industri':16,21,36 'louver':30 'machin':7 'part':5 'refriger':8 'unit':14 'use':17,22,32,37 'ventil':19,23,34

NITO

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