Home / Standards / JB/T 9224-1999 JB/T 9224-1999 Active 检定铸造粘结剂用标准砂 Standard Type JB ICS N/A CCS N/A Status Active Issue Date 1999-06-24 Implementation 2000-01-01 Centralized Committee 国家机械工业局 Issuing Authority 国家机械工业局