Home / Standards / GB/T 30858-2025 GB/T 30858-2025 Active Polished mono-crystalline sapphire substrate wafer 蓝宝石单晶衬底抛光片 Standard Type GBT ICS 29.045 CCS H83 Status 现行 Issue Date 2025-10-31 Implementation 2026-05-01 Responsible Dept 国家标准委 Drafting Unit N/A