[Class : 19] Gravel; Stone; Aggregates For Use In The Preparation Of Concrete; Road Coating Materials; Shingles, Not Of Metal; Macadam; Slag [Building Material]; Industrial Concrete For Use In Civil Engineering Works; Tarred Strips For Building; Tarred Roofing Paper; Tarred Felts; Compositions Of Glass Granules For Marking Roads; Refractory Granules; Glass Powder For Use As ...