Home / Standards / JB/T 6021-1992 JB/T 6021-1992 Abolished 磁电机产品型号编制规则 Standard Type JB ICS N/A CCS N/A Status Abolished Issue Date 1992-05-28 Implementation 1993-01-01 Centralized Committee 机械工业部 Issuing Authority 机械工业部