GB/T 21121-2024 Chinese PDF (GB /T21121-2024) GB/T 12412-2024 English versions: GB/T 19598-2025

English versions: GB/T 19598-2025

English versions: GB/T 24438

English versions: GB/T 12789

English versions: GB/T 19980-2025

3-2025_Chinese: Household electric direct-acting room heaters - Methods for measuring performance - Part 3: Additional provisions for the measurement of the radiation efficiency (Chinese: 家用直接作用式房间电加热器 性能测试方法 第3部分：辐射效率测量的附加规定)

GB/T 21121-2024 Chinese PDF (GB /T21121-2024) GB/T 12412-2024 English versions: GB/T 19598-2025GB T 21121 2024_Chinese: Animal and vegetable fats and oils Determination of oxidative stability(accelerated oxidation test) (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 21121 2024