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референтна | фреквенција
| фреквенција | |
| math. | częstość; częstotliwość |
| референтна: 15 phrases in 9 subjects |
| Economy | 1 |
| Electric machinery | 1 |
| Electrical engineering | 1 |
| Electronics | 2 |
| Magnetics | 3 |
| Mathematics | 3 |
| Metrology | 1 |
| Power electronics | 2 |
| Vacuum tubes | 1 |