 |
| mass concentration: 16 phrases in 11 subjects |
| Analytical chemistry | 1 |
| Biochemistry | 4 |
| Chemistry | 1 |
| Energy industry | 2 |
| Firefighting and fire-control systems | 2 |
| Forestry | 1 |
| General | 1 |
| Makarov | 1 |
| Pumps | 1 |
| Water resources | 1 |
| Weapons of mass destruction | 1 |
|
| mass concentration: 16 phrases in 11 subjects |
| Analytical chemistry | 1 |
| Biochemistry | 4 |
| Chemistry | 1 |
| Energy industry | 2 |
| Firefighting and fire-control systems | 2 |
| Forestry | 1 |
| General | 1 |
| Makarov | 1 |
| Pumps | 1 |
| Water resources | 1 |
| Weapons of mass destruction | 1 |