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| бартонские пески Парижского бассейна | |||
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| песок средней крупности; средний песок | |||
| среднезернистый песок | |||
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sables moyens : 6 phrases in 4 subjects |
| Geology | 2 |
| Hydraulic engineering | 2 |
| Natural resourses and wildlife conservation | 1 |
| Oil and gas technology | 1 |
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