Leather - Chemical determination of chromic oxide content - Part 1: Quantification by titration (ISO/DIS 5398-1:2017); German and English version prEN ISO 5398-1:2017
Leather - Chemical determination of chromic oxide content - Part 1: Quantification by titration (ISO 5398-1:2018); German version EN ISO 5398-1:2018— 14 стр.