 |
| |||
| 硬〔白，红〕煤 | |||
| 无烟煤、硬煤、白煤 | |||
| 硬白煤 | |||
| 无痂煤 | |||
| 无烟煤烟煤经变质作用转变成煤化程度高的煤。其挥发度低、密度大、着火温度高、无黏结性，燃烧时多不冒烟 | |||
| 无烟煤 | |||
| 白煤; 硬煤 | |||
| anthracite: 53 phrases in 11 subjects |
| Architecture | 3 |
| Chemistry | 1 |
| Earth sciences | 2 |
| Ecology | 3 |
| Electronics | 2 |
| General | 2 |
| Metallurgy | 9 |
| Oil / petroleum | 2 |
| Space | 1 |
| Technology | 27 |
| Water resources | 1 |