 |
|
air stack : 12 phrases in 8 subjects |
| Cement | 1 |
| Electronics | 1 |
| General | 1 |
| Makarov | 1 |
| Natural resourses and wildlife conservation | 1 |
| Nuclear physics | 4 |
| Oil / petroleum | 1 |
| Technology | 2 |
|
|
air stack : 12 phrases in 8 subjects |
| Cement | 1 |
| Electronics | 1 |
| General | 1 |
| Makarov | 1 |
| Natural resourses and wildlife conservation | 1 |
| Nuclear physics | 4 |
| Oil / petroleum | 1 |
| Technology | 2 |