 |
| respiratory protection: 13 phrases in 8 subjects |
| Environment | 1 |
| General | 3 |
| Makarov | 3 |
| Natural resourses and wildlife conservation | 2 |
| Nautical | 1 |
| Personal protective equipment | 1 |
| Technology | 1 |
| Weapons of mass destruction | 1 |
|
| respiratory protection: 13 phrases in 8 subjects |
| Environment | 1 |
| General | 3 |
| Makarov | 3 |
| Natural resourses and wildlife conservation | 2 |
| Nautical | 1 |
| Personal protective equipment | 1 |
| Technology | 1 |
| Weapons of mass destruction | 1 |