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折射率 : 50 phrases in 13 subjects |
| Antennas and waveguides | 5 |
| Chemistry | 2 |
| Electronics | 1 |
| General | 10 |
| Geology | 3 |
| Household appliances | 2 |
| Lasers | 1 |
| Nanotechnology | 2 |
| Oceanography & oceanology | 1 |
| Oil / petroleum | 2 |
| Oil processing plants | 1 |
| Quantum electronics | 2 |
| Technology | 18 |
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