propagação : 337 phrases in 28 subjects |
Agriculture | 17 |
Antennas and waveguides | 6 |
Chemistry | 5 |
Coal | 2 |
Communications | 35 |
Earth sciences | 22 |
Electronics | 119 |
Environment | 7 |
General | 10 |
Health care | 10 |
Industry | 1 |
Information technology | 13 |
International Monetary Fund | 1 |
Life sciences | 22 |
Materials science | 2 |
Mechanic engineering | 1 |
Medical | 8 |
Metallurgy | 1 |
Microsoft | 7 |
Natural resourses and wildlife conservation | 4 |
Natural sciences | 5 |
Patents | 1 |
Physical sciences | 4 |
Piezoelectric crystals | 2 |
Radio | 24 |
Scientific | 2 |
Superconductivity | 4 |
Transport | 2 |