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| perforage de fonçage (oil shale production) | |||
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| forage des puits | |||
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drilling well : 22 phrases in 11 subjects |
| Coal | 5 |
| Environment | 1 |
| Industry | 1 |
| Life sciences | 1 |
| Metallurgy | 8 |
| Mining | 1 |
| Natural resourses and wildlife conservation | 1 |
| Oil / petroleum | 1 |
| Transport | 1 |
| United Nations | 1 |
| Water resources | 1 |
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