
TESTING OF METALLIC MATERIALS; ROCKWELL HARDNESS TEST; C, A, B, F SCALES
出版:German Institute for Standardisation (Deutsches Institut für Normung)

专家解读视频
EURONORM 4 : 1979 - Similar to
ISO 6508 : 1986 - Similar to
EURONORM 4 : 1979 - Similar to
ISO 80 : 1968 - Similar to
ISO 6508 : 1986 - Similar to