690320101011
HS 690320101011 - Other refractory ceramics made of silica (such as kilns, pot furnaces, capsules, stoppers, supports); alumina, silica, or mixtures >50%, alumina<45%
Other refractory ceramics made of silica (such as kilns, pot furnaces, capsules, stoppers, supports); alumina, silica, or mixtures >50%, alumina<45%
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