 |
| |||
| замкнутая система | |||
| закрытая система | |||
| 封闭体系: 2 phrases in 2 subjects |
| Business | 1 |
| Electronics | 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