| |||
| материал с низким показателем преломления | |||
|
low-index material : 2 phrases in 2 subjects |
| Mathematics | 1 |
| Optics branch of physics | 1 |
| |||
| материал с низким показателем преломления | |||
|
low-index material : 2 phrases in 2 subjects |
| Mathematics | 1 |
| Optics branch of physics | 1 |