| |||
vertical sweep | |||
vertical scanning | |||
perpendicular scan | |||
| |||
cross track scanning |
垂直扫 描 : 20 phrases in 9 subjects |
Air defense | 2 |
Aviation | 2 |
Electronics | 1 |
Information technology | 2 |
Multimedia | 1 |
Project management | 1 |
Radio | 1 |
Technology | 7 |
Telecommunications | 3 |