Home / Standards / JB 5442-1991 JB 5442-1991 Active 压缩机重要零件的磁粉探伤 Standard Type JB54 ICS N/A CCS N/A Status Active Issue Date 1991-07-21 Implementation 1992-07-01 Centralized Committee 机械电子工业部 Issuing Authority 机械电子工业部