Home / Standards / GB/T 2684-2025 GB/T 2684-2025 Active Test methods for foundry sands and molding mixtures 铸造用砂及混合料试验方法 Standard Type GBT ICS 77.180 CCS J31 Status 现行 Issue Date 2025-03-28 Implementation 2025-10-01 Responsible Dept 国家标准委 Drafting Unit N/A