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GB/T 27894.3-2023 Natural gas - Determination of Composition and calculation of associated uncertainties by gas chromatography - Part 3: Precision and bias 天然气 用气相色谱法测定组成和计算相关不确定度 第3部分：精密度和偏差 - 英文版 |
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GB/T 27894.1-2020 Natural gas—Determination of composition and associated uncertainty by gas chromatography—Part 1: General guidelines and calculation of composition 天然气 用气相色谱法测定组成和计算相关不确定度 第1部分：总导则和组成计算 - 英文版 |
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GB/T 27894.2-2020 Natural gas—Determination of composition and associated uncertainty by gas chromatography—Part 2: Uncertainty calculations 天然气 用气相色谱法测定组成和计算相关不确定度 第2部分：不确定度计算 - 英文版 |
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GB/T 11062-2020 Natural gas—Calculation of calorific values, density, relative density and Wobbe indices from composition 天然气 发热量、密度、相对密度和沃泊指数的计算方法 - 英文版 |
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GB/T 20523-2006 Composition and calculation of enterprise logistics cost 企业物流成本构成与计算 - 英文版 |
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