Home / Standards / GB/T 2490-2003 GB/T 2490-2003 Conventional abrasive tools — Method for testing hardness with sand blasting hardness tester 普通磨具 奔砂硬度机检验硬度的方法 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