GB/T 30844.1-2024 Chinese PDF (GB /T30844.1-2024) GB/T 18892-2024 power supply units and combinations

power supply units and combinations thereof - Part 2: Particular requirements and tests for separating transformers and power supply units incorporating separating transformers for general applications (Chinese: 变压器、电抗器、电源装置及其组合的安全 第2部分：一般用途分离变压器和内装分离变压器的电源装置的特殊要求和试验)

4-2025_Chinese: Uncut finished spectacle lenses - Part 4: Anti-reflective coatings test methods (Chinese: 眼镜镜片 第4部分：减反射膜试验方法)

English versions: GB/T 26718-2024

English versions: GB/T 17670-2025

GB/T 30844.1-2024 Chinese PDF (GB /T30844.1-2024) GB/T 18892-2024 power supply units and combinationsGB T 30844. 1 2024_Chinese: Variable frequency drive of 1 kV and below Part 1: Technical conditions (Chinese: 1 kV 1) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 30844. 1 2024