Home / Standards / JB/T 3631-1992 JB/T 3631-1992 Abolished 树脂重负荷钢坯修磨砂轮 Standard Type JB ICS N/A CCS N/A Status Abolished Issue Date 1992-07-01 Implementation 1993-01-01 Centralized Committee 机械工业部 Issuing Authority 机械工业部