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| water treatment | |||
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| water treatment | |||
| traitement d’eau: 36 phrases in 9 subjects |
| Construction | 8 |
| Environment | 11 |
| General | 1 |
| Information technology | 1 |
| Name of organization | 2 |
| Natural resourses and wildlife conservation | 5 |
| United Nations | 1 |
| Water resources | 5 |
| Water supply | 2 |