Home / Standards / GB/T 45164-2024 GB/T 45164-2024 Active Classification and designation of defects in investment castings 熔模铸件缺陷分类及命名 Standard Type GBT ICS 77.020 CCS J31 Status 现行 Issue Date 2024-12-31 Implementation 2025-07-01 Responsible Dept 国家标准委 Drafting Unit N/A