flint t clay硬质耐火土
flint fire clay硬质耐火土
calcined flint clay熟硬质耐火土;硬质粘土熟料
Flint clay clinker硬质粘土熟料
flint clay detail燧石黏土
semi flint clay半硬质粘土
Burley flint clay伯雷耐火土
calcined d flint clay熟硬质耐火土