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Carboniferous period (MichaelBurov); Carbon (MichaelBurov); Carboniferous (MichaelBurov) | |||
carboniferous; Carbonic period | |||
age of coal; age of ferns | |||
the Carboniferous (пятый период палеозойской эры) |
каменноугольный период: 5 phrases in 5 subjects |
Cement | 1 |
General | 1 |
Oceanography & oceanology | 1 |
Oil processing plants | 1 |
Rail transport | 1 |