
Steel - Micrographic determination of the apparent grain size (ISO/FDIS 643:2015); German and English version FprEN ISO 643:2015
出版:German Institute for Standardisation (Deutsches Institut für Normung)

专家解读视频
Steel - Micrographic determination of the apparent grain size (ISO/FDIS 643:2015); German and English version FprEN ISO 643:2015
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频