FprEN ISO 21068-3
含有碳化硅、氮化硅、氮氧化硅和赛隆的原材料和耐火制品的化学分析 第3部分:氮、氧以及金属和氧化物成分的测定 (ISO/FDIS 21068-3:2024)
Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon - Part 3: Determination of nitrogen, oxygen and metallic and oxidic constituents (ISO/FDIS 21068‑3:2024)