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Jinyan 16-30 Mesh Precision Cast Mullite Sand 463% Al2O3 513% SiO2 High Refractoriness (1770C-2000C) 55-65% Mullite
30-60mesh High-purity Cast Mullite Sand with 55-65% Mullite Phase High Refractoriness (1770-2000C) 46% Al2O3 Content 25kg/bag
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