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a partire da: 19 phrases in 13 subjects |
Chemistry | 1 |
Coal | 2 |
Earth sciences | 1 |
Economy | 2 |
Electronics | 1 |
Energy industry | 1 |
Environment | 1 |
General | 2 |
Health care | 1 |
Information technology | 2 |
Mechanic engineering | 2 |
Metallurgy | 1 |
Transport | 2 |