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| qualité de service | |||
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service performance : 23 phrases in 9 subjects |
| Aviation | 2 |
| Communications | 11 |
| Economy | 1 |
| Employment | 1 |
| Finances | 1 |
| Patents | 1 |
| Research and development | 1 |
| Social science | 1 |
| Transport | 4 |
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