GB/T 39075.203-2023 Chinese PDF (GB/T39075.203-2023) GB/T 19183.5-2024 24-2025_Chinese: Methods for chemical analysis

24-2025_Chinese: Methods for chemical analysis of magnesium and magnesium alloys - Part 24: Determination of trace impurity elements contents - Glow discharge mass spectrometry (Chinese: 镁及镁合金化学分析方法 第24部分：痕量杂质元素的测定 辉光放电质谱法)

power supply units and combinations thereof - Part 14: Particular requirements and tests for auto-transformers and power supply units incorporating auto-transformers for general applications (Chinese: 变压器、电抗器、电源装置及其组合的安全 第14部分：一般用途自耦变压器和内装自耦变压器的电源装置的特殊要求和试验)

12-2024_Chinese: Nondestructive testing of amusement equipment - Part 12: Phase-array ultrasonic testing methods for bolts (Chinese: 游乐设施无损检测 第12部分：螺栓相控阵超声检测)

GB/T 21336

English versions: GB/T 45425-2025

GB/T 39075.203-2023 Chinese PDF (GB/T39075.203-2023) GB/T 19183.5-2024 24-2025_Chinese: Methods for chemical analysisGB T 39075. 203 2023_Chinese: Organic light emitting diode(OLED)light sources for general lighting Safety Part 2 3: Particular requirements Flexible OLED tiles and panels (Chinese: OLED 2 3: OLED) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 39075. 203 2023