 |
| |||
| workplace exposure levels (Marina_Onishchenko) | |||
| допустимые концентрации в воздухе рабочей зоны: 12 phrases in 8 subjects |
| Ecology | 2 |
| Industrial hygiene | 1 |
| Occupational health & safety | 2 |
| Oil and gas | 1 |
| Production | 1 |
| Security systems | 1 |
| United States | 1 |
| Weapons of mass destruction | 3 |