 |
| |||
| sonic reflection | |||
| отражение звуковой волны: 8 phrases in 5 subjects |
| Construction | 1 |
| Makarov | 1 |
| Oil and gas technology | 1 |
| Telecommunications | 4 |
| Transport | 1 |
|
| |||
| sonic reflection | |||
| отражение звуковой волны: 8 phrases in 5 subjects |
| Construction | 1 |
| Makarov | 1 |
| Oil and gas technology | 1 |
| Telecommunications | 4 |
| Transport | 1 |