GB/T 21037-2024 Chinese PDF (GB/T21037-2024) GB/T 18282.1-2025 GB/T 45422-2025_Chinese: Chemicals - Surface

GB/T 45422-2025_Chinese: Chemicals - Surface water-sediment Misgurnus anguillicaudatus toxicity test (Chinese: 化学品 地表水系统-沉积物中泥鳅毒性试验)

English versions: GB/T 29631-2025

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)

English versions: GB/T 19923-2024

GB/T 21037-2024 Chinese PDF (GB/T21037-2024) GB/T 18282.1-2025 GB/T 45422-2025_Chinese: Chemicals - SurfaceGB T 21037 2024_Chinese: Determination of diaveridine, trimethoprim and ormetoprim in feeds (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 21037 2024