GB/T 7409.1-2024 Chinese PDF (GB/T7409.1-2024) GB/T 20032-2024 GB/T 45649-2025_Chinese: Technical guidelines for

GB/T 45649-2025_Chinese: Technical guidelines for the application of coaxial turbine units in metallurgical waste heat and pressure energy recovery (Chinese: 冶金余热余压能量回收同轴机组应用技术指南)

GB/T 34497-2023_Chinese: Copper and copper alloy strip and foil for terminal connectors (Chinese: 端子连接器用铜及铜合金带箔材)

English versions: GB/T 17737

GB/T 43275-2023_Chinese: Screening determination of certain elements of antimony

3-2024_Chinese: Information technology - Security techniques - Non-repudiation - Part 3: Mechanisms using asymmetric techniques (Chinese: 信息技术 安全技术 抗抵赖 第3部分：采用非对称技术的机制)

GB/T 7409.1-2024 Chinese PDF (GB/T7409.1-2024) GB/T 20032-2024 GB/T 45649-2025_Chinese: Technical guidelines forGB T 7409. 1 2024_Chinese: Excitation systems for synchronous machines Part 1: Definitions (Chinese: 1) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 7409. 1 2024