 |
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| houille flambante | |||
| houille bitumineuse | |||
| houille grasse | |||
| charbon bitumineux | |||
| charbon gras; charbon mou; charbon flambant | |||
| |||
| charbons trois quarts gras | |||
| bituminous coal: 15 phrases in 6 subjects |
| Chemistry | 1 |
| Coal | 6 |
| Energy industry | 1 |
| Environment | 1 |
| Metallurgy | 4 |
| Statistics | 2 |