| 1. | Classification for coal quality part 2 : sulfur content
煤炭质量分级第2部分：硫分 |
| 2. | Analysis on coal quality at light mining face in
中厚煤层轻放回采煤质问题分析 |
| 3. | Strengthening quality management and raising coal quality
加强煤质管理提高煤炭质量 |
| 4. | Application of coal quality management system in jiaozuo co ltd
有限责任公司的应用 |
| 5. | Classification for coal quality part 3 : calorific value
煤炭质量分级第3部分：发热量 |
| 6. | Application of coal quality target for comparing seam
浅谈煤质指标在煤层对比中的应用 |
| 7. | Examination and verification of data from inspection of coal quality
煤质检验数据的审核 |
| 8. | Automatic weighing and data management coal quality analysis
煤质分析自动称重与数据管理 |
| 9. | Strengthening coal quality management and creating brand effect
强化煤质管理力创品牌效益 |
| 10. | How to raise coal quality in xiaoyu coal mine
提高小峪矿煤质的几点建议 |
