quartzite fireproofing materials硅: silicon耐火材料: refractory; fireproofing; gr ...碳化硅耐火材料: carbofrax; carborundum refractory; refrax; silicon carbide refractory氧氮化硅耐火材料: silicon oxynitride refractory多孔碳化硅耐火材料: porous silicon carbide refractory; porous silicon-carbide refractory下载手机词典可随时随地查词查翻译