heating, ventilation, air conditioning equipment namely, louvres, smoke dampers, fire dampers, and grills, air registers, and damper control systems, respectively comprised of sheet metal blades, metal grills, metal frames, and electric and hydraulic motors, and electric temperature sensors and relays

'air':3,14 'blade':25 'compris':21 'condit':4 'control':18 'damper':9,11,17 'electr':31,36 'equip':5 'fire':10 'frame':29 'grill':13,27 'heat':1 'hydraul':33 'louvr':7 'metal':24,26,28 'motor':34 'name':6 'regist':15 'relay':40 'respect':20 'sensor':38 'sheet':23 'smoke':8 'system':19 'temperatur':37 'ventil':2

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