 |
| |||
| guard of circuit | |||
|
电路保持 : 34 phrases in 11 subjects |
| Air defense | 1 |
| Communications | 2 |
| Electric machinery | 1 |
| Electronics | 3 |
| Mathematics | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 3 |
| Shipbuilding | 1 |
| Space | 7 |
| 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