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zmiękczanie : 47 phrases in 11 subjects |
| Chemistry | 8 |
| Construction | 6 |
| Energy industry | 1 |
| Engineering | 1 |
| Microsoft | 1 |
| Plumbing | 5 |
| Sanitation | 1 |
| Steam boilers | 2 |
| Technology | 10 |
| Textile industry | 9 |
| Water supply | 3 |
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