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eixo : 345 phrases in 31 subjects |
| Agriculture | 2 |
| Antennas and waveguides | 3 |
| Brazil | 8 |
| Chemistry | 4 |
| Communications | 22 |
| Construction | 7 |
| Criminal law | 1 |
| Earth sciences | 31 |
| Economy | 5 |
| Electric traction | 8 |
| Electronics | 35 |
| Finances | 1 |
| General | 11 |
| Industry | 32 |
| Information technology | 8 |
| Law | 1 |
| Life sciences | 18 |
| Mathematics | 1 |
| Mechanic engineering | 47 |
| Medical | 11 |
| Metallurgy | 5 |
| Microsoft | 5 |
| Natural sciences | 5 |
| Patents | 2 |
| Physics | 1 |
| Radio | 2 |
| Rail transport | 1 |
| Satellite communications | 5 |
| Scientific | 3 |
| Technology | 2 |
| Transport | 58 |
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