obturador : 85 phrases in 15 subjects |
Agriculture | 5 |
Chemistry | 11 |
Communications | 1 |
Construction | 3 |
Cultural studies | 1 |
Earth sciences | 1 |
Electronics | 1 |
General | 4 |
Industry | 1 |
Materials science | 14 |
Mechanic engineering | 18 |
Medical | 5 |
Metallurgy | 2 |
Natural sciences | 1 |
Transport | 17 |