DIN 51303 : 1995被替代
MATERIAL TESTING MACHINES; STANDARDIZED BLOCKS FOR THE VERIFICATION OF STATIC HARDNESS TESTING MACHINES
出版：German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频
ISO 726 : 1982 - Similar to
ISO 640 : 1984 - Similar to
ISO 1355 : 1989 - Similar to
ISO 674 : 1988 - Similar to
ISO 726 : 1982 - Similar to
ISO 674 : 1988 - Similar to
ISO 1355 : 1989 - Similar to
