Home / Standards / GB/T 25074-2017 GB/T 25074-2017 Abolished Solar-grade polycrystalline silicon 太阳能级多晶硅 Standard Type GBT ICS 29.045 CCS H82 Status 废止 Issue Date 2017-11-01 Implementation 2018-05-01 Responsible Dept 国家标准委 Drafting Unit N/A