Home / Standards / JB/T 6050-1992 JB/T 6050-1992 Abolished 钢铁热处理零件硬度检验通则 Standard Type JB ICS N/A CCS N/A Status Abolished Issue Date 1992-05-05 Implementation 1993-07-01 Centralized Committee 机械工业部 Issuing Authority 机械工业部