metal duct systems for ventilating, air conditioning, heating and exhaust systems, namely, tubes, hoses, pipes and conduits, fitted with closures and sealers; metal parts and fittings of such tubes, hoses, pipes and conduits, namely couplings, elbows, T-pieces and reducers fitted with closers and sealers; closing, sealing and packing means made of metal intended for the above-mentioned goods, namely outer and inner pipesockets and girdle-type couplings; and manual valves made of metal

'above-ment':58 'air':6 'close':47 'closer':44 'closur':20 'condit':7 'conduit':17,33 'coupl':35,71 'duct':2 'elbow':36 'exhaust':10 'fit':18,26,42 'girdl':69 'girdle-typ':68 'good':61 'heat':8 'hose':14,30 'inner':65 'intend':55 'made':52,75 'manual':73 'mean':51 'mention':60 'metal':1,23,54,77 'name':12,34,62 'outer':63 'pack':50 'part':24 'piec':39 'pipe':15,31 'pipesocket':66 'reduc':41 'seal':48 'sealer':22,46 'system':3,11 't-piec':37 'tube':13,29 'type':70 'valv':74 'ventil':5

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