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| поверхностный показатель преломления | |||
| surface index: 15 phrases in 10 subjects |
| Cement | 1 |
| Construction | 1 |
| Dentistry | 2 |
| Electronics | 2 |
| Makarov | 2 |
| Mathematics | 1 |
| Medical | 2 |
| Military | 1 |
| Oil / petroleum | 1 |
| Ophthalmology | 2 |
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