DIN EN ISO 6508-2:2015-06 金属材料洛氏硬度试验第2部分:试验机和压头的验证和校准
Metallic materials - Rockwell hardness test - Part 2: Verification and calibration of testing machines and indenters (ISO 6508-2:2015); German version EN ISO 6508-2:2015 / Note: To be replaced by DIN EN ISO 6508-2 (2022-12).