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hard coal; pit coal | |||
coal | |||
carboniferous formation; coal-bearing formation; coal-formation; fossil charcoal; mineral coal |
carbone fossile : 17 phrases in 8 subjects |
Bioenergy | 1 |
Chemistry | 2 |
Coal | 3 |
Energy industry | 1 |
Food service and catering | 1 |
Industry | 2 |
Life sciences | 2 |
Metallurgy | 5 |