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| zone de référence | |||
| champ de référence (A field that is associated with another field so that their properties always match. If the properties in one field are changed, the properties in the other field are updated automatically) | |||
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reference field : 7 a las frases, 5 temas |
| Antenas y guías de onda. | 1 |
| Construcción | 1 |
| Radio | 2 |
| Tecnología | 1 |
| Tecnología de la información | 2 |