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| coal The natural, rocklike, brown to black derivative of forest-type plant material, usually accumulated in peat beds and progressively compressed and indurated until it is finally altered in to graphite-like material | |||
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ogle : 25 do fraz, 6 tematyki |
| Chemia | 8 |
| Ekonomia | 3 |
| Ochrona środowiska | 7 |
| Polityka | 1 |
| Pospolicie | 4 |
| Przemysł energetyczny | 2 |