Home / Standards / YB/T 4439-2014 YB/T 4439-2014 Abolished 加热炉用高铝质锚固砖 Standard Type YB ICS N/A CCS N/A Status Abolished Issue Date 2014-10-14 Implementation 2015-04-01 Centralized Committee 中国钢铁工业协会 Issuing Authority 中国钢铁工业协会