DIN EN ISO 4491-4:2013
金属粉末.利用还原法测定氧含量.第4部分:利用还原萃取法测定总氧量(ISO 4491-4-2013).德文版本EN ISO 4491-4-2013
Metallic powders - Determination of oxygen content by reduction methods - Part 4: Total oxygen by reduction-extraction (ISO 4491-4:2013); German version EN ISO 4491-4:2013