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| |||
| low level; lower level; lower flight level | |||
| bottom level | |||
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niveau inférieur : 29 phrases in 14 subjects |
| Aviation | 10 |
| Chemistry | 1 |
| Communications | 1 |
| Computers | 5 |
| Earth sciences | 1 |
| Electronics | 2 |
| General | 1 |
| International Monetary Fund | 1 |
| Labor law | 2 |
| Law | 1 |
| Metallurgy | 1 |
| Social science | 1 |
| Transport | 1 |
| Радиоактивное излучение | 1 |
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