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| air layer | |||
| air space | |||
| tropospheric layer | |||
| Luftschicht: 21 phrases in 9 subjects |
| Building structures | 1 |
| Construction | 4 |
| Earth sciences | 1 |
| Life sciences | 1 |
| Microelectronics | 1 |
| Natural resourses and wildlife conservation | 2 |
| Nuclear physics | 6 |
| Paragliding | 2 |
| Physics | 3 |