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οπή : 255 phrases in 21 subjects |
Agriculture | 12 |
Chemistry | 8 |
Coal | 4 |
Communications | 3 |
Construction | 7 |
Earth sciences | 13 |
Economy | 4 |
Electronics | 19 |
Environment | 2 |
General | 4 |
Industry | 20 |
Information technology | 9 |
Life sciences | 4 |
Materials science | 6 |
Mechanic engineering | 48 |
Medical | 3 |
Metallurgy | 31 |
Natural resourses and wildlife conservation | 1 |
Natural sciences | 7 |
Technology | 1 |
Transport | 49 |