GB/T 45465.1-2025 Chinese PDF (GB /T45465.1-2025) GB 31648-2025 English versions: GB/T 45520-2025

English versions: GB/T 45520-2025

English versions: GB/T 19212

1-2025_Chinese: Particle - Separation performance test for particle size separator - Part 1: General principles (Chinese: 颗粒 粒度切割器切割性能测试 第1部分：通则)

English versions: GB/T 22385-2025

English versions: GB/T 44977-2024

GB/T 45465.1-2025 Chinese PDF (GB /T45465.1-2025) GB 31648-2025 English versions: GB/T 45520-2025GB 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