 |
| |||
| multiple reflection echo | |||
|
多次 反射波 : 17 phrases in 9 subjects |
| Acoustics | 1 |
| Air defense | 1 |
| Construction | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Geophysics | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 3 |
| Technology | 6 |
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error
| Get short URL | Language Selection Tips