| 1. | Reference material - standard gas - nitrogen monoxide 基准材料.标准气体.一氧化氮 |
| 2. | Reference material - standard gas - carbon monoxide 基准材料.标准气体.一氧化碳 |
| 3. | Reference material - standard gas - carbon dioxide 基准材料.标准气体.二氧化碳 |
| 4. | Reference material - standard gas - sulfur dioxide 基准材料.标准气体.二氧化硫 |
| 5. | Reference material - standard gas - methane 基准材料.标准气体.甲烷 |
| 6. | Reference material - standard gas - propane 基准材料.标准气体.丙烷 |
| 7. | Reference material - standard gas - oxygen 基准材料.标准气体.氧气 |
| 8. | Isotopic analysis of uranium by single - standard gas mass - spectrometer method 单标准气体质谱法铀同位素分析 |
| 9. | Preparation of standard gas of sulfur dioxide in nitrogen and gas of oxygen in nitrogen 氮气中二氧化硫气体标准样品的研制 |
| 10. | Evaluation of uncertainty in measurement for instrument coefficient of standard gas meter 标准煤气表仪表系数测量不确定度分析 |