Home / Standards / JB/T 5220-1991 JB/T 5220-1991 Abolished 转速数字显示仪 Standard Type JB ICS N/A CCS N/A Status Abolished Issue Date 1991-06-27 Implementation 1992-07-01 Centralized Committee 机械电子工业部 Issuing Authority 机械电子工业部