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| dispositif de commutation | |||
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| boîtier de commutation | |||
| boîtier d'écoute | |||
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switch unit : 25 phrases in 9 subjects |
| Aviation | 1 |
| Communications | 5 |
| Computers | 1 |
| Earth sciences | 1 |
| Electronics | 4 |
| General | 2 |
| Information technology | 8 |
| Mechanic engineering | 2 |
| Transport | 1 |