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| total water hardness (Анна Ф) | |||
| жёсткость общая: 16 phrases in 12 subjects |
| Analytical chemistry | 1 |
| Armored vehicles | 1 |
| Automobiles | 1 |
| Construction | 1 |
| Ecology | 2 |
| Energy industry | 3 |
| Makarov | 1 |
| Mass media | 2 |
| Nanotechnology | 1 |
| Polymers | 1 |
| Public utilities | 1 |
| Technology | 1 |