GB/T 15972.33-2024 Chinese PDF (GB /T15972.33-2024) GB 31604.31-2025 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)

GB 12268-2025_Chinese: List of dangerous goods (Chinese: 危险货物品名表)

English versions: GB/T 12789

socket-outlets and couplers for industrial purposes - Part 6: Direct current(DC) plugs

GB/T 15972.33-2024 Chinese PDF (GB /T15972.33-2024) GB 31604.31-2025 power supply units and combinationsGB T 15972. 33 2024_Chinese: Specifications for optical fibre test methods Part 33: Measurement methods and test procedures for mechanical characteristics Stress corrosion susceptibility (Chinese: 33 ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 15972. 33 2024