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características : 494 phrases in 45 subjects |
| Accumulators | 1 |
| Antennas and waveguides | 3 |
| Brazil | 2 |
| Chemistry | 3 |
| Coal | 1 |
| Communications | 50 |
| Construction | 5 |
| Earth sciences | 30 |
| Electric machinery | 2 |
| Electric traction | 4 |
| Electrical engineering | 3 |
| Electricity generation | 2 |
| Electronics | 197 |
| Environment | 1 |
| Finances | 2 |
| General | 5 |
| Health care | 6 |
| Human rights activism | 1 |
| Industry | 1 |
| Information technology | 23 |
| Law | 3 |
| Life sciences | 10 |
| Lighting other than cinema | 1 |
| Magnetics | 1 |
| Mathematics | 8 |
| Mechanic engineering | 21 |
| Medical | 3 |
| Metallurgy | 24 |
| Metrology | 1 |
| Municipal planning | 1 |
| Natural sciences | 2 |
| Nuclear physics | 2 |
| Pharmacy and pharmacology | 3 |
| Power electronics | 2 |
| Power system protection | 5 |
| Radio | 1 |
| Radiology | 1 |
| Scientific | 4 |
| Semiconductors | 3 |
| Statistics | 16 |
| Technology | 10 |
| Transport | 11 |
| Vacuum tubes | 13 |
| Welding | 2 |
| Work flow | 4 |
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