GB/T 45465.1-2025 Chinese PDF (GB /T45465.1-2025) GB/T 20717-2024 1-2025_Chinese: Testing and calculating methods

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: 热回收新风机组季节性能系数测试和计算方法 第1部分：供热显热回收季节性能系数)

English versions: GB/T 20882

GB/T 27530-2025_Chinese: Diagnostic techniques for bovine haemorrhagic septicaemia (Chinese: 牛出血性败血症诊断技术)

shouldered (Chinese: 成型模 直导柱、带肩导柱和带肩定位导柱)

GB/T 45465.1-2025 Chinese PDF (GB /T45465.1-2025) GB/T 20717-2024 1-2025_Chinese: Testing and calculating methodsGB 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