GB/Z 45064-2024 Chinese PDF (GB /Z45064-2024) GB/T 12690.20-2024 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)

GB/T 44995-2024_Chinese: Polypropylene packaging container - Guidelines for the construction of initial screening testing methods for doped with recycled plastic (Chinese: 聚丙烯包装容器 掺杂回收塑料初筛测试方法构建指南)

English versions: GB/T 24345-2025

GB/T 44937

English versions: GB/T 45475

GB/Z 45064-2024 Chinese PDF (GB /Z45064-2024) GB/T 12690.20-2024 1-2025_Chinese: Testing and calculating methodsGBZ45064 2024_Chinese: Equipment for general lighting purposes Stroboscopic effects Objective test method (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GBZ45064 2024