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| black coal A natural black graphitelike material used as a fuel, formed from fossilized plants and consisting of amorphous carbon with various organic and some inorganic compounds | |||
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akmenogles : 8 фраз в 5 тематиках |
| Окружающая среда | 2 |
| Уголь | 3 |
| Химия | 1 |
| Экология | 1 |
| Экономика | 1 |