Supports for catalysts, consisting of porous ceramic pieces, of a blend of silicon carbide and silicon, with a hardness of less than 9 on the Mohs scale, with a total volume of not more than 65 litres, having, per cm$2 of the surface of the cross section one or more closed channels at the tail end
Part of: 690919 — Ceramic wares for laboratory, chemical or other technical uses — Other
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