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| plant operation | |||
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exploitation d'installation : 13 phrases, 9 sujets |
| Agriculture | 1 |
| Aviation | 1 |
| Communications | 1 |
| Échange international | 1 |
| Économie | 2 |
| Général | 1 |
| Planification municipale | 1 |
| Ressources naturelles et conservation de la faune | 1 |
| Transport | 4 |