Home / Standards / GB/T 31552-2023 GB/T 31552-2023 Active Foundry machinery—Classification and model designation 铸造机械 分类与型号编制方法 Standard Type GBT ICS 25.120.30 CCS J61 Status 现行 Issue Date 2023-03-17 Implementation 2023-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A