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| clapet de dépression | |||
| tube à vide | |||
| reniflard m | |||
| vacuum valve: 20 phrases in 10 subjects |
| Agriculture | 1 |
| Chemistry | 4 |
| Electronics | 2 |
| Insurance | 2 |
| Mechanic engineering | 5 |
| Natural resourses and wildlife conservation | 1 |
| Power electronics | 1 |
| Technology | 1 |
| Transport | 1 |
| Water resources | 2 |