 |
| звуковое давление: 13 phrases in 7 subjects |
| Astronautics | 1 |
| Construction | 1 |
| Medical appliances | 1 |
| Natural resourses and wildlife conservation | 3 |
| Physics | 3 |
| Radio | 1 |
| Technology | 3 |
|
| звуковое давление: 13 phrases in 7 subjects |
| Astronautics | 1 |
| Construction | 1 |
| Medical appliances | 1 |
| Natural resourses and wildlife conservation | 3 |
| Physics | 3 |
| Radio | 1 |
| Technology | 3 |