GB/T 30425-2025 Chinese PDF (GB /T30425-2025) GB/T 21536-2024 power supply units and combinations

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)

English versions: GB/T 20965-2025

8-2025_Chinese: Test methods of rare earth phosphors for LED - Part 8: Determination of pressure cooker test property (Chinese: LED用稀土荧光粉试验方法 第8部分：高压加速老化性能的测定)

GB/T 41780

GB/T 30425-2025 Chinese PDF (GB /T30425-2025) GB/T 21536-2024 power supply units and combinationsGB T 30425 2025_Chinese: Water cooling equipment for converter valves for high voltage direct current(HVDC) ower transmission (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 30425 2025