Home / Standards / GB/T 9442-2024 GB/T 9442-2024 Active Silica sand for foundry 铸造用硅砂 Standard Type GBT ICS 91.100.15 CCS J31 Status 现行 Issue Date 2024-04-25 Implementation 2024-04-25 Responsible Dept 国家标准委 Drafting Unit N/A