Metallic materials - Rockwell hardness test - Part 3: Calibration of reference blocks (scales A, B, C, D, E, F, G, H, K, N, T) (ISO 6508-3:2005); German version EN ISO 6508-3:2005— 19 стр.
Surgical instruments - Metallic materials - Part 1: Stainless steel (ISO 7153-1:1991, including Amendment 1:1999); German version EN ISO 7153-1:2000— 7 стр.