 |
| acoustic material: 10 phrases in 7 subjects |
| Astronautics | 1 |
| Automated equipment | 1 |
| Construction | 1 |
| Electronics | 1 |
| Energy industry | 1 |
| Natural resourses and wildlife conservation | 3 |
| Technology | 2 |
|
| acoustic material: 10 phrases in 7 subjects |
| Astronautics | 1 |
| Automated equipment | 1 |
| Construction | 1 |
| Electronics | 1 |
| Energy industry | 1 |
| Natural resourses and wildlife conservation | 3 |
| Technology | 2 |