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| water treating | |||
| water treatment Purification of water to make it suitable for drinking or for any other use | |||
| water treatment | |||
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| water treatment | |||
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| water treatment | |||
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traitement de l'eau : 20 a las frases, 9 temas |
| Agricultura | 1 |
| Ambiente | 5 |
| General | 2 |
| Geología | 1 |
| Industria textil | 2 |
| Jurídico | 1 |
| Metalurgia | 1 |
| Recursos hídricos | 2 |
| Recursos naturales y conservación de la vida silvestre. | 5 |