DIN EN ISO 18473-4 E:2023 特殊用途的功能性颜料和填料 第4部分：用于光催化应用的纳米级二氧化钛 (ISO 18473-4:2022) 草案
Draft Document - Functional pigments and extenders for special applications - Part 4: Nanoscale titanium dioxide for photocatalytic application (ISO 18473-4:2022); German and English version prEN ISO 18473-4:2023