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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| 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 |
China National Standards guide composition |
 English PDF |
| GB/T 29164-2012 |
Guide for utilization of certified reference materials for composition analysis and physical property measurements of coal 煤炭成分分析和物理特性测量标准物质应用导则 |
China National Standards guide composition |
English PDF |
| GB/T 28814-2012 |
The guide for composition of the ±800kV converter station operating code ±800kV换流站运行规程编制导则 |
China National Standards guide composition |
English PDF |
| GB/T 27894.1-2011 |
Natural gas - Determination of composition with defined uncertainty by gas chromatogramphy - Part 1：Guidelines for tailored analysis 天然气 在一定不确定度下用气相色谱法测定组成 第1部分：分析导则 |
China National Standards guide composition |
English PDF |
| GB/T 22279-2008 |
Guide for development of certified reference materials for the composition analysis and the physical property measurements of coal 煤炭成分分析和物理特性测量标准物质研制导则 |
China National Standards guide composition |
English PDF |
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