GB/T 45465.1-2025 Chinese PDF (GB /T45465.1-2025) GB/T 20717-2024 English versions: GB/T 20882

English versions: GB/T 20882

GB/T 4213-2024_Chinese: Pneumatic control valves (Chinese: 气动控制阀)

1-2025_Chinese: Test methods of rare earth phosphors for LED - Part 1: Determination of spectrum (Chinese: LED用稀土荧光粉试验方法 第1部分：光谱的测定)

17-2024_Chinese: Safety requirements for electrical equipment for measurement

English versions: GB/T 26250-2025

GB/T 45465.1-2025 Chinese PDF (GB /T45465.1-2025) GB/T 20717-2024 English versions: GB/T 20882GB T 45465. 1 2025_Chinese: Testing and calculating methods for seasonal performance factor of energy recovery ventilators for outdoor air handling Part 1: Seasonal performance factor of sensible heating recovery (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 45465. 1 2025