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| fattore di riduzione della lunghezza d'onda | |||
| 波長: 29 phrases in 7 subjects |
| Antennas and waveguides | 14 |
| Electricity generation | 1 |
| Lighting other than cinema | 2 |
| Piezoelectric crystals | 3 |
| Radio | 4 |
| Radiology | 4 |
| Vacuum tubes | 1 |
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