 |
| null direction: 7 phrases in 6 subjects |
| Electronics | 1 |
| Natural resourses and wildlife conservation | 2 |
| Nautical | 1 |
| Programming | 1 |
| Quantum electronics | 1 |
| Technology | 1 |
|
| null direction: 7 phrases in 6 subjects |
| Electronics | 1 |
| Natural resourses and wildlife conservation | 2 |
| Nautical | 1 |
| Programming | 1 |
| Quantum electronics | 1 |
| Technology | 1 |