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| уровень кислотности (The amount of acid present in a solution, often expressed in terms of pH; Количество кислоты, содержащееся в растворе, часто выражаемое в значении pH) | |||
| acidity degree: 7 phrases in 5 subjects |
| Automobiles | 2 |
| Firefighting and fire-control systems | 1 |
| General | 2 |
| Perfume | 1 |
| Rail transport | 1 |