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pressure-filter : 20 phrases in 10 subjects |
| Chemistry | 1 |
| Communications | 2 |
| Construction | 2 |
| Earth sciences | 2 |
| Environment | 1 |
| Mechanic engineering | 1 |
| Metallurgy | 2 |
| Natural resourses and wildlife conservation | 3 |
| Technology | 2 |
| Transport | 4 |
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