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GB/T 13511
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)
GB/T 13815
6-2025_Chinese: Plugs
75-2025_Chinese: National food safety standard - Nutrition fortifier - 6S-5-methyltetrahydrofolate
GB/T 15972.40-2024 Chinese PDF (GB /T15972.40-2024) GB/T 12789.1-2025 GB/T 13511GB T 15972. 40 2024_Chinese: Specifications for optical fibre test methods Part 40: Measurement methods and test procedures for transmission characteristics Attenuation (Chinese: 40 ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 15972. 40 2024
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