Non-metallic flexible pipes and hoses being parts of air intake application, heating and air conditioning systems in houses, office buildings and industrial buildings; non-metal flexible pipes of polymer being parts of air intake application, heating and air conditioning systems in houses, office buildings and industrial buildings; rigid pipes of polypropylene being parts of air intake application, heating and air conditioning systems in houses, office buildings and industrial buildings

'air':11,16,36,41,58,63 'applic':13,38,60 'build':22,25,47,50,69,72 'condit':17,42,64 'flexibl':4,29 'heat':14,39,61 'hose':7 'hous':20,45,67 'industri':24,49,71 'intak':12,37,59 'metal':3,28 'non':2,27 'non-met':26 'non-metal':1 'offic':21,46,68 'part':9,34,56 'pipe':5,30,52 'polym':32 'polypropylen':54 'rigid':51 'system':18,43,65

Non-metal vent cover for hvac ducts; non-metal ventilating ducts

'cover':5 'duct':8,13 'hvac':7 'metal':3,11 'non':2,10 'non-met':1,9 'vent':4 'ventil':12

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