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| système de code | |||
| système de codage | |||
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| système de codage | |||
| code system: 40 phrases in 12 subjects |
| Aviation | 5 |
| Commerce | 1 |
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| Computers | 1 |
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| Electronics | 1 |
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| General | 5 |
| Information technology | 5 |
| International trade | 1 |
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| Telecommunications | 1 |