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propagação : 348 phrases in 28 subjects |
| Agriculture | 13 |
| Antennas and waveguides | 9 |
| Chemistry | 4 |
| Coal | 1 |
| Communications | 40 |
| Earth sciences | 21 |
| Electronics | 131 |
| Environment | 8 |
| General | 8 |
| Health care | 11 |
| Industry | 2 |
| Information technology | 21 |
| International Monetary Fund | 2 |
| Life sciences | 21 |
| Materials science | 3 |
| Mechanic engineering | 1 |
| Medical | 5 |
| Metallurgy | 1 |
| Microsoft | 6 |
| Natural resourses and wildlife conservation | 6 |
| Natural sciences | 5 |
| Patents | 1 |
| Physical sciences | 3 |
| Piezoelectric crystals | 3 |
| Radio | 17 |
| Scientific | 2 |
| Superconductivity | 2 |
| Transport | 1 |
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