 |
| |||
| coefficient of performance for system | |||
| 系统性能系数: 8 phrases in 4 subjects |
| Aviation | 4 |
| Electronics | 2 |
| Space | 1 |
| Technology | 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