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| air pipe | |||
| air conduit | |||
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| air channel | |||
| air duct | |||
| conduite d'air: 32 phrases in 10 subjects |
| Agriculture | 1 |
| Chemistry | 1 |
| Construction | 4 |
| Energy industry | 5 |
| General | 3 |
| Mechanic engineering | 6 |
| Metallurgy | 2 |
| Natural resourses and wildlife conservation | 2 |
| Nuclear physics | 1 |
| Transport | 7 |