 |
| |||
| screening doublet | |||
| 屏蔽 双线: 18 phrases in 7 subjects |
| Aviation | 1 |
| Communications | 1 |
| Electronics | 6 |
| General | 2 |
| Information technology | 3 |
| Technology | 4 |
| Telecommunications | 1 |
|
| |||
| screening doublet | |||
| 屏蔽 双线: 18 phrases in 7 subjects |
| Aviation | 1 |
| Communications | 1 |
| Electronics | 6 |
| General | 2 |
| Information technology | 3 |
| Technology | 4 |
| Telecommunications | 1 |