GB/T 21974-2024 Chinese PDF (GB/T21974-2024) GB/T 1149.11-2023 3-2023_Chinese: Secondary coating materials used

3-2023_Chinese: Secondary coating materials used for optical fibre - Part 3: Modified polycarbonate (Chinese: 光纤用二次被覆材料 第3部分：改性聚碳酸酯)

supplied electronic control gear for fluorescent lamps (Chinese: 光源控制装置 第2-3部分：荧光灯用交流和/或直流电子控制装置的特殊要求)

English versions: GB 31604

GB/T 20604-2025_Chinese: Natural gas - Vocabulary (Chinese: 天然气 词汇)

20-2025_Chinese: Methods for chemical analysis of tungsten concentrates - Part 20: Determination of mercury content - Solid sampling and direct mercury analysis method (Chinese: 钨精矿化学分析方法 第20部分：汞含量的测定 固体进样直接测定法)

GB/T 21974-2024 Chinese PDF (GB/T21974-2024) GB/T 1149.11-2023 3-2023_Chinese: Secondary coating materials usedGB T 21974 2024_Chinese: YZRW series eddy current braking wound rotor three phase induction motors for crane and metallurgical applications Technical specification (frame size 112315) (Chinese: YZRW 112315) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 21974 2024