Home / Standards / GB/T 45729-2025 GB/T 45729-2025 Active Test methods for active ion concentration in laser material 激光材料中激活离子浓度测试方法 Standard Type GBT ICS 31.260 CCS L51 Status 现行 Issue Date 2025-05-30 Implementation 2025-09-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A