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ARTIFICIAL CORUNDUM, WHETHER OR NOT CHEMICALLY DEFINED
SECTION VI. Products of the chemical or allied industries
IV. INORGANIC BASES AND OXIDES, HYDROXIDES AND PEROXIDES OF METALS
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artificial corundum, whether or not chemically defined:
containing 98.5% by weight or more of aluminium oxide:
containing less than 98.5% by weight of aluminium oxide: