Home / Standards / GB/T 31352-2014 GB/T 31352-2014 Active Test methods for warp of sapphire substrates 蓝宝石衬底片翘曲度测试方法 Standard Type GBT ICS 77.040.99 CCS H21 Status 现行 Issue Date 2014-12-31 Implementation 2015-09-01 Responsible Dept 国家标准委 Drafting Unit N/A