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2002-7-16u2002·u2002heat-treated: - Pumice stone: 25131100 -- Crude or in irregular pieces, including 4 EC,US 0. crushed pumice ('bimskies') 25131900 -- Other 4 EC,US 0. 25132000 - Emery, natural corundum, natural 4 JP,US 0. garnet and other natural abrasives. 2514 Slate, whether or not roughly trimmed . or merely cut, by sawing or otherwise,
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