GB/T 20871.61-2024 Chinese PDF (GB/T20871.61-2024) GB/T 41869.4-2024 English versions: GB/T 45335-2025

English versions: GB/T 45335-2025

English versions: GB/T 26940-2023

12-2024_Chinese: Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides - Part 12: Determination of thorium and uranium contents - Inductively coupled plasma mass spectrum method (Chinese: 稀土金属及其氧化物中非稀土杂质 化学分析方法 第12部分：钍、铀量的测定 电感耦合等离子体质谱法)

English versions: GB/T 29469-2024

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 20871.61-2024 Chinese PDF (GB/T20871.61-2024) GB/T 41869.4-2024 English versions: GB/T 45335-2025GB T 20871. 61 2024_Chinese: Organic light emitting diode(OLED) displays Part 6 1: Measuring methods of optical and electro optical parameters (Chinese: 6 1) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20871. 61 2024