GB/T 7247.2-2024 Chinese PDF (GB/T7247.2-2024) GB/T 45263-2025 English versions: GB 4716-2024

English versions: GB 4716-2024

English versions: GB/T 17592-2024

GB/T 45020-2024_Chinese: Methods for chemical analysis of niobium hafnium alloys - Determination of trace impurity elements content - Inductively coupled plasma mass spectrometry (Chinese: 铌铪合金化学分析方法 痕量杂质元素的测定 电感耦合等离子体质谱法)

8-2025_Chinese: Test methods of rare earth phosphors for LED - Part 8: Determination of pressure cooker test property (Chinese: LED用稀土荧光粉试验方法 第8部分：高压加速老化性能的测定)

GB/T 7247.2-2024 Chinese PDF (GB/T7247.2-2024) GB/T 45263-2025 English versions: GB 4716-2024GB T 7247. 2 2024_Chinese: Safety of laser products Part 2: Safety of optical fibre communication systems (OFCSs) (Chinese: 2OFCS) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 7247. 2 2024