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GB/T 21649.1-2024 Chinese PDF (GB/T21649.1-2024) GB 10408-2025 20-2025_Chinese: Methods for chemical analysis
GB/T 21649.1-2024 Chinese PDF (GB/T21649.1-2024) GB 10408-2025 20-2025_Chinese: Methods for chemical analysis
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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)
English versions: GB/T 20871
English versions: YY/T 1946-2024
GB/T 2035-2024_Chinese: Plastics - Vocabulary (Chinese: 塑料 术语)
English versions: GB/T 20845-2024
GB/T 21649.1-2024 Chinese PDF (GB/T21649.1-2024) GB 10408-2025 20-2025_Chinese: Methods for chemical analysisGB T 21649. 1 2024_Chinese: Particle size analysis Image analysis methods Part 1: Static image analysis methods (Chinese: 1) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 21649. 1 2024
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