GB/T 4437.1-2023 Chinese PDF (GB/T4437.1-2023) GB/T 13511.2-2025 English versions: GB/T 35560-2025

English versions: GB/T 35560-2025

English versions: GB/T 6150

English versions: GB/T 45428-2025

power supply units and combinations thereof - Part 5: Particular requirements and tests for isolating transformers and power supply units incorporating isolating transformers for general applications (Chinese: 变压器、电抗器、电源装置及其组合的安全 第5部分：一般用途隔离变压器和内装隔离变压器的电源装置的特殊要求和试验)

1-2024_Chinese: Smart city - City digital twin - Part 1: Technical reference architecture (Chinese: 智慧城市 城市数字孪生 第1部分：技术参考架构)

GB/T 4437.1-2023 Chinese PDF (GB/T4437.1-2023) GB/T 13511.2-2025 English versions: GB/T 35560-2025GB T 4437. 1 2023_Chinese: Aluminium and aluminium alloys extruded tubes Part 1: Seamless tubes (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 4437. 1 2023