rigid pipes, not of metal, for building; asphalt, pitch, tar and bitumen; transportable buildings, not of metal; monuments, not of metal; Non-metal shelter structures and non-metal pre-fabricated buildings; non-metal pre-fabricated residential buildings and houses; pre-fabricated non-metal houses

'asphalt':8 'bitumen':12 'build':7,14,34,42 'fabric':33,40,47 'hous':44,51 'metal':5,17,21,24,30,37,50 'monument':18 'non':23,29,36,49 'non-met':22,28,35,48 'pipe':2 'pitch':9 'pre':32,39,46 'pre-fabr':31,38,45 'residenti':41 'rigid':1 'shelter':25 'structur':26 'tar':10 'transport':13

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