Home / Standards / XB/T 502-1993 XB/T 502-1993 Abolished 钐钴1-5型永磁合金粉 Standard Type XB ICS N/A CCS N/A Status Abolished Issue Date 1993-06-26 Implementation 1994-07-01 Centralized Committee 国务院稀土领导小组 Issuing Authority 国务院稀土领导小组