Home / Standards / GB/T 41972-2022 GB/T 41972-2022 Active Cast irons—Classification and designation of casting imperfections 铸铁件 铸造缺陷分类及命名 Standard Type GBT ICS 77.140.80 CCS J31 Status 现行 Issue Date 2022-10-12 Implementation 2022-10-12 Responsible Dept 国家标准委 Drafting Unit N/A