 |
| |||
| opening ratio | |||
|
孔径率 : 17 phrases in 6 subjects |
| Air defense | 3 |
| Metallurgy | 1 |
| Shipbuilding | 1 |
| Space | 10 |
| Technology | 1 |
| Telecommunications | 1 |
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