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| water treating | |||
| water treatment | |||
| water treatment Purification of water to make it suitable for drinking or for any other use | |||
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| water treatment | |||
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| water treatment | |||
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traitement de l'eau : 20 do fraz, 9 tematyki |
| Geologia | 1 |
| Hutnictwo | 1 |
| Ochrona środowiska | 5 |
| Pospolicie | 2 |
| Prawo | 1 |
| Rolnictwo | 1 |
| Włókiennictwo | 2 |
| Zasoby naturalne i ochrona dzikiej przyrody | 5 |
| Zasoby wodne | 2 |