Heat exchangers, other than parts of machines, for industrial use; emission control systems composed primarily of indirect contact heat exchangers and ozone-based control devices using gas and vapor condensing to control and treat emissions, for industrial use; air filters for industrial use, namely, air filters for industrial installations

'air':40,46 'base':24 'compos':14 'condens':31 'contact':18 'control':12,25,33 'devic':26 'emiss':11,36 'exchang':2,20 'filter':41,47 'gas':28 'heat':1,19 'indirect':17 'industri':9,38,43,49 'instal':50 'machin':7 'name':45 'ozon':23 'ozone-bas':22 'part':5 'primarili':15 'system':13 'treat':35 'use':10,27,39,44 'vapor':30

Air filters for mechanical purposes for industrial use; dust collecting machines for industrial use; cyclone separators; industrial dust separators and centrifugal dust collecting machines for separating particles from fluids; heat exchangers, being parts of machines, for industrial use

'air':1 'centrifug':21 'collect':10,23 'cyclon':15 'dust':9,18,22 'exchang':31 'filter':2 'fluid':29 'heat':30 'industri':7,13,17,37 'machin':11,24,35 'mechan':4 'part':33 'particl':27 'purpos':5 'separ':16,19,26 'use':8,14,38

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