 |
| |||
| total level width | |||
| полная ширина уровня: 7 phrases in 4 subjects |
| General | 1 |
| Optics branch of physics | 1 |
| Technology | 4 |
| Telecommunications | 1 |
|
| |||
| total level width | |||
| полная ширина уровня: 7 phrases in 4 subjects |
| General | 1 |
| Optics branch of physics | 1 |
| Technology | 4 |
| Telecommunications | 1 |