 |
| |||
| solid propellant | |||
|
火箭火药 : 15 phrases in 4 subjects |
| Aviation | 3 |
| Construction | 1 |
| Metallurgy | 1 |
| Space | 10 |
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