NON-METALLIC BUILDING MATERIALS, NAMELY, CONCRETE, GYPSUM, ASPHALT, PITCH, ASPHALT BITUMEN, AND ARTIFICIAL STONE TO WHICH MICRON-SIZED PARTICLES OF VARIOUS MATERIALS HAVE BEEN APPLIED TO THE SURFACE THEREOF OR INTEGRATED INTO THE BULK THEREOF

'appli':27 'artifici':14 'asphalt':9,11 'bitumen':12 'build':4 'bulk':36 'concret':7 'gypsum':8 'integr':33 'materi':5,24 'metal':3 'micron':19 'micron-s':18 'name':6 'non':2 'non-metal':1 'particl':21 'pitch':10 'size':20 'stone':15 'surfac':30 'thereof':31,37 'various':23

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