 |
| |||
| quad | |||
| 四线组: 20 phrases in 10 subjects |
| Aviation | 1 |
| Communications | 1 |
| Construction | 1 |
| Electronics | 1 |
| General | 1 |
| Metallurgy | 1 |
| Military | 1 |
| Rail transport | 1 |
| Technology | 8 |
| Telecommunications | 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