 |
| libération des gaz: 11 phrases in 5 subjects |
| Chemistry | 1 |
| Mining | 1 |
| Natural resourses and wildlife conservation | 3 |
| Nuclear physics | 3 |
| Oil and gas technology | 3 |
|
| libération des gaz: 11 phrases in 5 subjects |
| Chemistry | 1 |
| Mining | 1 |
| Natural resourses and wildlife conservation | 3 |
| Nuclear physics | 3 |
| Oil and gas technology | 3 |