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| axe de la fibre | |||
| axe principal; axe f | |||
| axe optique | |||
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| axe optique; axe visuel | |||
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optical axis : 5 phrases in 4 subjects |
| Astronomy | 2 |
| Earth sciences | 1 |
| Electronics | 1 |
| Life sciences | 1 |
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