Home / Standards / GB/T 45469-2025 GB/T 45469-2025 Active Microbeam analysis—Transmission electron microscopy—Preparation methods of ultrathin section of polymer composites 微束分析 透射电子显微术 聚合物复合材料超薄切片制备方法 Standard Type GBT ICS 71.040.99 CCS G 04 Status 现行 Issue Date 2025-03-28 Implementation 2025-10-01 Responsible Dept 国家标准委 Drafting Unit N/A