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| referentna grupa; uporedna grupa | |||
| referentna grupa (A group that is associated with another group so that their properties and the properties of the groups and fields they contain always match. If the properties of one group are changed, the other group is updated automatically) | |||
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reference group : 2 a las frases, 2 temas |
| Jurídico | 1 |
| Óptica rama de la física | 1 |