vedação : 96 phrases in 16 subjects |
Agriculture | 6 |
Chemistry | 6 |
Coal | 6 |
Communications | 1 |
Construction | 6 |
Earth sciences | 18 |
Electronics | 5 |
Environment | 3 |
General | 1 |
Health care | 1 |
Industry | 11 |
Materials science | 2 |
Mechanic engineering | 21 |
Natural sciences | 2 |
Patents | 1 |
Transport | 6 |