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varão : 17 phrases in 10 subjects |
| Antennas and waveguides | 1 |
| Construction | 1 |
| Earth sciences | 1 |
| Forestry | 1 |
| Industry | 5 |
| Mechanic engineering | 2 |
| Metallurgy | 2 |
| Natural resourses and wildlife conservation | 1 |
| Thermal Energy | 1 |
| Vacuum tubes | 2 |
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