 |
| концентрация ионов: 47 phrases in 17 subjects |
| Agriculture | 2 |
| Astronautics | 1 |
| Biology | 1 |
| Chemistry | 6 |
| Electronics | 3 |
| Food industry | 4 |
| Forestry | 2 |
| Geology | 1 |
| Hydraulic engineering | 1 |
| Medical appliances | 5 |
| Mining | 2 |
| Oil and gas technology | 6 |
| Packaging | 2 |
| Physics | 4 |
| Technology | 3 |
| Textile industry | 1 |
| Water supply | 3 |