| |||
high frequency detecting finding | |||
high-frequency direction finding | |||
high frequency direction finder | |||
high frequency direction finding |
高频测向: 80 phrases in 10 subjects |
Air defense | 10 |
Aviation | 20 |
Electronics | 10 |
General | 10 |
Geophysics | 6 |
Navigation | 2 |
Oil / petroleum | 2 |
Radio | 2 |
Space | 6 |
Technology | 12 |