Dampers, namely, control devices used in air ducts to regulate the flow of air; Fans for HVAC units; Ventilating exhaust fans; Ventilating fans for commercial and industrial use; Ventilating fans for industrial purposes; Ventilating louvers; Ventilating, high-velocity fixed exhaust fans for commercial and agricultural use; Ventilating, high-velocity portable exhaust fans for commercial and agricultural use; Ventilation fan accessories, namely, grilles; Ventilation hoods

'accessori':62 'agricultur':46,58 'air':7,14 'commerci':25,44,56 'control':3 'damper':1 'devic':4 'duct':8 'exhaust':20,41,53 'fan':15,21,23,30,42,54,61 'fix':40 'flow':12 'grill':64 'high':38,50 'high-veloc':37,49 'hood':66 'hvac':17 'industri':27,32 'louver':35 'name':2,63 'portabl':52 'purpos':33 'regul':10 'unit':18 'use':5,28,47,59 'veloc':39,51 'ventil':19,22,29,34,36,48,60,65

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