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| خزان | |||
| حاجز واق من المياه ؛السد الصغير ؛سدة | |||
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| جسر - حاجز | |||
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dique : 32 phrases in 9 subjects |
| Agriculture | 1 |
| Construction | 2 |
| Environment | 2 |
| General | 1 |
| Hydrology | 6 |
| Microbiology | 1 |
| Soil science | 7 |
| Technology | 1 |
| Water resources | 11 |
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