 |
| |||
| attenuation ratio | |||
| 衰减 比率: 6 phrases in 4 subjects |
| Electronics | 2 |
| Geophysics | 1 |
| Metallurgy | 1 |
| Technology | 2 |
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