EN ISO 1833-21:2019
纺织品.定量化学分析.第21部分:含氯,某些改性聚丙烯腈纤维,某些弹性纤维,醋酸酯,三乙酸和某些其他
Textiles - Quantitative chemical analysis - Part 21: Mixtures of chlorofibres, certain modacrylics, certain elastanes, acetates, triacetates with certain other fibres (method using cyclohexanone) (ISO 1833-21:2019)