Home / Standards / GB/T 30858-2014 GB/T 30858-2014 Abolished Polished mono-crystalline sapphire substrate product 蓝宝石单晶衬底抛光片 Standard Type GBT ICS 29.045 CCS H83 Status 废止 Issue Date 2014-07-24 Implementation 2015-04-01 Responsible Dept 国家标准委 Drafting Unit N/A