Home / Standards / GB/T 31092-2022 GB/T 31092-2022 Active Monocrystalline sapphire bar 蓝宝石单晶晶棒 Standard Type GBT ICS 29.045 CCS H83 Status 现行 Issue Date 2022-12-30 Implementation 2023-07-01 Responsible Dept 国家标准委 Drafting Unit N/A