 |
| |||
| selective control | |||
| 重点控制: 10 phrases in 6 subjects |
| Aviation | 1 |
| Computer networks | 1 |
| Information technology | 1 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Technology | 5 |
|
| |||
| selective control | |||
| 重点控制: 10 phrases in 6 subjects |
| Aviation | 1 |
| Computer networks | 1 |
| Information technology | 1 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Technology | 5 |