propagação : 315 phrases in 27 subjects |
Agriculture | 18 |
Antennas and waveguides | 10 |
Brazil | 6 |
Chemistry | 3 |
Coal | 1 |
Communications | 38 |
Earth sciences | 14 |
Electronics | 118 |
Environment | 7 |
General | 8 |
Health care | 11 |
Industry | 2 |
Information technology | 14 |
Life sciences | 19 |
Materials science | 1 |
Mechanic engineering | 1 |
Medical | 6 |
Metallurgy | 1 |
Microsoft | 1 |
Natural resourses and wildlife conservation | 6 |
Natural sciences | 5 |
Patents | 1 |
Physical sciences | 3 |
Piezoelectric crystals | 4 |
Radio | 15 |
Scientific | 1 |
Transport | 1 |