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| puits tubulaire; puits abyssinien | |||
| puits foncé par battage | |||
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| puits tubulaire; puits abyssinien; puits instantané | |||
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tube well : 11 phrases in 6 subjects |
| Agriculture | 1 |
| Economy | 3 |
| Environment | 2 |
| Metallurgy | 3 |
| Natural resourses and wildlife conservation | 1 |
| Радиоактивное излучение | 1 |
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