Home / Standards / GB/T 4340.2-1999 GB/T 4340.2-1999 Metallic materials — Vickers hardness test — Part 2: Verification of testing machines 金属维氏硬度试验 第2部分:硬度计的检验 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A