 |
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| 操作和监测 | |||
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operation and monitoring : 6 phrases, 6 sujets |
| Communications | 1 |
| Écologie | 1 |
| Électronique | 1 |
| Espace | 1 |
| Nations unies | 1 |
| Transport ferroviaire | 1 |
|
| |||
| 操作和监测 | |||
|
operation and monitoring : 6 phrases, 6 sujets |
| Communications | 1 |
| Écologie | 1 |
| Électronique | 1 |
| Espace | 1 |
| Nations unies | 1 |
| Transport ferroviaire | 1 |