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| еталонне поле (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 : 3 фразы в 2 тематиках |
| Авиация | 2 |
| Аэропорты и управление воздушным движением | 1 |