GB/T 21121-2024 Chinese PDF (GB /T21121-2024) GB/T 12412-2024 power supply units and combinations

power supply units and combinations thereof - Part 14: Particular requirements and tests for auto-transformers and power supply units incorporating auto-transformers for general applications (Chinese: 变压器、电抗器、电源装置及其组合的安全 第14部分：一般用途自耦变压器和内装自耦变压器的电源装置的特殊要求和试验)

English versions: GB/T 19598-2025

English versions: GB/T 19396-2025

1-2025_Chinese: Cards and security devices for personal identification - Test methods - Part 1: General characteristics (Chinese: 卡及身份识别安全设备 测试方法 第1部分：一般特性)

English versions: GB/T 19980-2025

GB/T 21121-2024 Chinese PDF (GB /T21121-2024) GB/T 12412-2024 power supply units and combinationsGB T 21121 2024_Chinese: Animal and vegetable fats and oils Determination of oxidative stability(accelerated oxidation test) (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 21121 2024