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| |||
| coal dust | |||
| char layer | |||
| char layer (碳化烧蚀材料的) | |||
|
炭层 : 45 phrases in 15 subjects |
| Agriculture | 2 |
| Architecture | 1 |
| Automobiles | 5 |
| Biology | 1 |
| Bridge construction | 1 |
| Earth sciences | 7 |
| General | 1 |
| Geology | 1 |
| Metallurgy | 5 |
| Oil / petroleum | 2 |
| Oil processing plants | 1 |
| Plastics | 1 |
| Polymers | 1 |
| Space | 5 |
| Technology | 11 |
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