DIN EN ISO 643:2023-08 钢 - 表观晶粒尺寸的显微测定(ISO/DIS 643:2023)
Steels - Micrographic determination of the apparent grain size (ISO/DIS 643:2023); German and English version prEN ISO 643:2023 / Note: Date of issue 2023-07-07*Intended as replacement for DIN EN ISO 643 (2020-06).