DIN EN ISO 4499-4-2016 硬质金属.显微组织的金相学测定.第4部分:孔隙度,碳缺陷和η相含量的表征(ISO 4499-4-2016).德文版本EN ISO 4499-4-2016
Hardmetals - Metallographic determination of microstructure - Part 4: Characterisation of porosity, carbon defects and eta-phase content (ISO 4499-4:2016); German version EN ISO 4499-4:2016