Home / Standards / YS/T 309-1998 YS/T 309-1998 Abolished 重熔用铝稀土合金锭 Standard Type YS ICS N/A CCS N/A Status Abolished Issue Date 1998-11-03 Implementation 1999-05-01 Centralized Committee 国家有色金属工业局 Issuing Authority 国家有色金属工业局