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| chantier d'aérage; passage d'aérage; recoupe de ventilation; passage m; recoupe f; galerie de ventilation; boyau m; recoupe d'aérage; galerie d'aérage; voie d'aérage | |||
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galleria di ventilazione : 5 phrases in 1 subject |
| Metallurgy | 5 |
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