GB/T 9489-2024 Chinese PDF (GB /T9489-2024) GB/T 44939-2024 2-2025_Chinese: Nanotechnology - Nanogenerator -

2-2025_Chinese: Nanotechnology - Nanogenerator - Part 2: Test methods for electric performance of triboelectric nanogenerators (Chinese: 纳米技术 纳米发电机 第2部分：摩擦纳米发电机电性能测试方法)

GB/T 45404-2025_Chinese: Data security technology - Requirements for large Internet companies internal personal information protection supervision agency (Chinese: 数据安全技术 大型互联网企业内设个人信息保护监督机构要求)

GB/T 21638-2025_Chinese: Microbeam analysis - Guidelines for electron beam microanalysis of defects in steel materials (Chinese: 微束分析 钢铁材料缺陷电子束显微分析方法通则)

GB/T 30237-2025_Chinese: Deteriorations and legends of ancient wall paintings (Chinese: 古代壁画病害与图示)

English versions: GB/T 7358-2025

GB/T 9489-2024 Chinese PDF (GB /T9489-2024) GB/T 44939-2024 2-2025_Chinese: Nanotechnology - Nanogenerator -GB T 9489 2024_Chinese: Methods for chemical analysis of alundum powder (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 9489 2024