Home / Standards / GB/T 28159-2011 GB/T 28159-2011 Abolished Electronic grade phosphoric acid 电子级磷酸 Standard Type GBT ICS 31.030 CCS L90 Status 废止 Issue Date 2011-12-30 Implementation 2012-07-01 Responsible Dept 国家标准委 Drafting Unit N/A