obturador : 113 phrases in 18 subjects |
Agriculture | 3 |
Antennas and waveguides | 2 |
Chemistry | 10 |
Construction | 3 |
Cultural studies | 1 |
Earth sciences | 1 |
Electronics | 2 |
General | 4 |
Industry | 1 |
Materials science | 14 |
Mechanic engineering | 18 |
Medical | 18 |
Metallurgy | 2 |
Natural sciences | 1 |
Packaging | 19 |
Patents | 1 |
Radio | 1 |
Transport | 12 |