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Referenz | Grundfrequenz
| Grundfrequenz | |
| el. acoust. | تردد أساسي |
| math. | التردد الاساسى |
| Referenz: 10 phrases in 6 subjects |
| Antennas and waveguides | 1 |
| International Monetary Fund | 1 |
| Lighting other than cinema | 1 |
| Mathematics | 3 |
| Microsoft | 2 |
| Power electronics | 2 |