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Yufengrec alumna brick are made of high-grade flint clay,Chamotte High Alumina Bauxite with alumina content from 36% to 85% , producing by drying pressing and high fired .
Yufengrec alumna brick are made of high-grade flint clay,Chamotte High Alumina Bauxite with alumina content from 36% to 85% , producing by drying pressing and high fired .