Metallic materials - Knoop hardness test - Part 2: Verification and calibration of testing machines (ISO 4545-2:2017); German version EN ISO 4545-2:2018— 29 стр.
Metallic materials - Calibration of force-proving instruments used for the verification of uniaxial testing machines (ISO 376:2011); German version EN ISO 376:2011— 42 стр.
Metallic materials - Knoop hardness test - Part 2: Verification and calibration of testing machines (ISO 4545-2:2005); German version EN ISO 4545-2:2005— 23 стр.
Metallic materials - Knoop hardness test - Part 2: Verification and calibration of testing machines (ISO/DIS 4545-2:2015); German and English version prEN ISO 4545-2:2015
Metallic materials - Knoop hardness test - Part 2: Verification and calibration of testing machines (ISO 4545-2:2005); German version EN ISO 4545-2:2005— 23 стр.