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Système harmonisé
Section XIII
ARTICLES OF STONE, PLASTER, CEMENT, ASBESTOS, MICA OR SIMILAR MATERIALS; CERAMIC PRODUCTS; GLASS AND GLASSWARE
Chapter 69
Ceramic products
Heading 6903
Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths.
6903.10
- Containing by weight more than 50 % of free carbon
6903.20
- Containing by weight more than 50Â % of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)
6903.90