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extraction de pétrole | |||
extraction d'huile | |||
séparation d'huile (sewage) | |||
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extraction de pétrole |
oil extraction: 9 phrases in 6 subjects |
Agriculture | 4 |
Economy | 1 |
Energy industry | 1 |
Health care | 1 |
International trade | 1 |
Natural resourses and wildlife conservation | 1 |