Home / Standards / GB/T 12963-2014 GB/T 12963-2014 Abolished Electronic-grade polycrystalline silicon 电子级多晶硅 Standard Type GBT ICS 29.045 CCS H82 Status 废止 Issue Date 2014-12-31 Implementation 2015-09-01 Responsible Dept 国家标准委 Drafting Unit N/A