DIN EN ISO 16859-2:2016 金属材料.里氏硬度试验.第2部分:测试设备的验证和校准(ISO 16859-2-2015);德文版本EN ISO 16859-2-2015
Metallic materials - Leeb hardness test - Part 2: Verification and calibration of the testing devices (ISO 16859-2:2015); German version EN ISO 16859-2:2015