Home / Standards / GB/T 39141.4-2024 GB/T 39141.4-2024 Active Mineral and sapphire watch-glasses—Part 4: Anti-reflective treatment 无机和蓝宝石手表玻璃 第4部分:减反射处理 Standard Type GBT ICS 39.040.10 CCS Y11 Status 现行 Issue Date 2024-11-28 Implementation 2025-06-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A