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| глубокий шахтный ствол | |||
| глубокий колодец | |||
| глубокая скважина | |||
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puits profond : 11 phrases in 6 subjects |
| Chromatography | 1 |
| Geology | 3 |
| Natural resourses and wildlife conservation | 1 |
| Oil / petroleum | 2 |
| Oil and gas | 2 |
| Oil and gas technology | 2 |
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