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ISO 1833-21 2019 Textiles Quantitative chemical analysis Part 21 Mixtures of chlorofibres certain modacrylics certain elastanes acetates triacetates with certain other fibres (method using cyclohexa
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ISO 1833-21 2019 Textiles Quantitative chemical analysis Part 21 Mixtures of chlorofibres certain modacrylics certain elastanes acetates triacetates with certain other fibres (method using cyclohexa
