Ductwork, ducting and related accessories for heating, ventilation and air conditioning systems, namely, ducts, flexible ducts, couplings, elbows, joints, collars, connectors, and fittings, all made wholly or principally of non-metal

'accessori':5 'air':10 'collar':20 'condit':11 'connector':21 'coupl':17 'duct':2,14,16 'ductwork':1 'elbow':18 'fit':23 'flexibl':15 'heat':7 'joint':19 'made':25 'metal':32 'name':13 'non':31 'non-met':30 'princip':28 'relat':4 'system':12 'ventil':8 'wholli':26

Non-metallic flexible pipes and non-metal couplings, elbows, joints, collars, connectors, and fittings, all for heating, ventilation and air conditioning systems

'air':22 'collar':13 'condit':23 'connector':14 'coupl':10 'elbow':11 'fit':16 'flexibl':4 'heat':19 'joint':12 'metal':3,9 'non':2,8 'non-met':7 'non-metal':1 'pipe':5 'system':24 'ventil':20

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