GB/T 7409.1-2024 Chinese PDF (GB/T7409.1-2024) GB/T 20032-2024 1-2025_Chinese: Nickel base brazing filler

1-2025_Chinese: Nickel base brazing filler metals - Part 1: Solid brazing filler metals (Chinese: 镍基钎料 第1部分：实心钎料)

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)

English versions: GB/T 19720-2024

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)

English versions: GB/T 24631

GB/T 7409.1-2024 Chinese PDF (GB/T7409.1-2024) GB/T 20032-2024 1-2025_Chinese: Nickel base brazing fillerGB 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