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| |||
| doughnut; toroid | |||
| vacuum chamber; work chamber | |||
| altitude chamber; hypobaric chamber | |||
| chambre à vide: 8 phrases in 5 subjects |
| Earth sciences | 2 |
| Electronics | 3 |
| General | 1 |
| Mechanic engineering | 1 |
| Transport | 1 |
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