Framework for building, not of metal; water-pipes, not of metal; water-pipe valves, not of metal or plastic; branching pipes, not of metal; rigid pipes, not of metal, for building; building materials, not of metal, namely, plastic pipe supports; drain pipes, not of metal; drain traps, namely, water-pipe valves, not of metal or plastic; penstock pipes, not of metal; plastic ducts used in construction, not for electrical circuitry

'branch':22 'build':3,33,34 'circuitri':73 'construct':69 'drain':43,48 'duct':66 'electr':72 'framework':1 'materi':35 'metal':6,12,19,26,31,38,47,57,64 'name':39,50 'penstock':60 'pipe':9,15,23,28,41,44,53,61 'plastic':21,40,59,65 'rigid':27 'support':42 'trap':49 'use':67 'valv':16,54 'water':8,14,52 'water-pip':7,13,51

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