| |||
| opt; optics | |||
| optical equipment | |||
| optical (equipment) | |||
|
оптическое оборудование : 50 phrases in 10 subjects |
| Cables and cable production | 24 |
| Computer networks | 1 |
| Construction | 1 |
| Mass media | 12 |
| Military | 2 |
| Programming | 1 |
| Radioengineering | 4 |
| Technology | 2 |
| Telecommunications | 2 |
| Trade classification | 1 |