obturador: 141 phrases in 20 subjects |
Agriculture | 3 |
Antennas and waveguides | 2 |
Chemistry | 12 |
Communications | 1 |
Construction | 2 |
Cultural studies | 1 |
Earth sciences | 2 |
Electronics | 2 |
General | 5 |
Industry | 1 |
Materials science | 17 |
Mechanic engineering | 22 |
Medical | 20 |
Metallurgy | 3 |
Natural sciences | 2 |
Packaging | 25 |
Patents | 1 |
Radio | 1 |
Remote sensing | 4 |
Transport | 15 |