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| συντελεστής ανάκλασης; ανακλαστικστητα | |||
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facteur de réflexion : 14 phrases in 6 subjects |
| Communications | 2 |
| Earth sciences | 5 |
| Electronics | 3 |
| Industry | 2 |
| Natural sciences | 1 |
| Transport | 1 |
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