Home / Standards / GB/T 26659-2011 GB/T 26659-2011 Active Reclaimed silica sand for foundry 铸造用再生硅砂 Standard Type GBT ICS 13.030.50 CCS J31 Status 现行 Issue Date 2011-06-16 Implementation 2012-03-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委