GB/Z 45064-2024 Chinese PDF (GB /Z45064-2024) GB/T 12690.20-2024 English versions: GB/T 45475

English versions: GB/T 45475

GB/T 44937

GB/T 45517-2025_Chinese: Determination of phenol in toys and children's products - High performance liquid chromatography (Chinese: 玩具及儿童用品中苯酚的测定 高效液相色谱法)

English versions: GB/T 45452-2025

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/Z 45064-2024 Chinese PDF (GB /Z45064-2024) GB/T 12690.20-2024 English versions: GB/T 45475GBZ45064 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