 |
| |||
| уровень помех; уровень шумов | |||
| noise-emission level: 4 phrases in 4 subjects |
| Acoustics | 1 |
| Military | 1 |
| Natural resourses and wildlife conservation | 1 |
| Transport | 1 |
|
| |||
| уровень помех; уровень шумов | |||
| noise-emission level: 4 phrases in 4 subjects |
| Acoustics | 1 |
| Military | 1 |
| Natural resourses and wildlife conservation | 1 |
| Transport | 1 |