Refractory materials, namely, fired refractory materials not of metal, fireclay, bricks, refractory castable mixes not of metal, refractory blocks not of metal for use as furnace lining, mortar for building, non-metallic rigid pipes for building, asphalt, pitch and bitumen, non-metallic transportable buildings, monuments not of metal

'asphalt':38 'bitumen':41 'block':19 'brick':11 'build':30,37,46 'castabl':13 'fire':4 'fireclay':10 'furnac':26 'line':27 'materi':2,6 'metal':9,17,22,33,44,50 'mix':14 'monument':47 'mortar':28 'name':3 'non':32,43 'non-metal':31,42 'pipe':35 'pitch':39 'refractori':1,5,12,18 'rigid':34 'transport':45 'use':24

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