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värähtely : 30 phrases in 11 subjects |
| Communications | 4 |
| Earth sciences | 6 |
| Electronics | 9 |
| Environment | 1 |
| General | 1 |
| Magnetics | 1 |
| Mathematics | 3 |
| Power lines | 1 |
| Scientific | 1 |
| Statistics | 1 |
| Transport | 2 |
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