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Product
690320: Refractory ceramic goods other than bricks/blocks/tiles (e.g., retorts, crucibles, muff;es, nozzles, plugs, support,cupels, tubes, pipes, sheaths & rods), containing by weight >50% of alumina Al2O3/of a mixture/compound of alumina & of silica SiO2
Treaty
SADC
Rule
Manufacture in which all the materials used are classified within a heading other than that of the product

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