|
switching relay : 38 phrases in 15 subjects |
| Armored vehicles | 1 |
| Astronautics | 1 |
| Automobiles | 2 |
| Communications | 1 |
| Electrical engineering | 2 |
| Electronics | 1 |
| General | 1 |
| Information technology | 1 |
| Mass media | 2 |
| Mathematics | 1 |
| Mechanics | 1 |
| Occupational health & safety | 4 |
| Rail transport | 5 |
| Technology | 12 |
| Telecommunications | 3 |