 |
| |||
| Fraunhofer line | |||
| 夫琅和 费 线: 17 phrases in 5 subjects |
| Cartography | 2 |
| Earth sciences | 2 |
| Physics | 7 |
| Space | 2 |
| Technology | 4 |
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