Metal pipes for liquid and gas transfer; Metal valves for controlling the flow of gases in pipes not being parts of machines; Metal pipes for gases; metal elbows for connecting gas pipes to gas appliances; metal conduits for connecting gas pipes; Metal seals for use in preventing gas leaks; Metal gas pipes and metal fittings therefor

'applianc':35 'conduit':37 'connect':30,39 'control':11 'elbow':28 'fit':55 'flow':13 'gas':6,31,34,40,48,51 'gase':15,26 'leak':49 'liquid':4 'machin':22 'metal':1,8,23,27,36,42,50,54 'part':20 'pipe':2,17,24,32,41,52 'prevent':47 'seal':43 'therefor':56 'transfer':7 'use':45 'valv':9

Non-metal building materials, namely, plastic ducts for gas pipe conduits

'build':4 'conduit':12 'duct':8 'gas':10 'materi':5 'metal':3 'name':6 'non':2 'non-met':1 'pipe':11 'plastic':7

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