| 1. | Solid mineral fuels . classification of coals for the coking 固体矿物燃料.炼焦用煤的分类 |
| 2. | Standard classification of coals by rank 煤分级的标准分类 |
| 3. | Classification of coal mine water 煤矿矿井水分类 |
| 4. | Classification of coal 煤的分类法 |
| 5. | Classification of coals 煤的分类 |
| 6. | The regularity is obvious about the correspondence between mean maximum reflectance of vitrinite and classification of coals 但总的来说,烟煤镜质组反射率与煤种之间的关系规律性明显。 |