selective frequency
| control
| selective frequency | |
| mil., air.def. | 选择频率控制 |
| control | |
| hydroel.st. | 调节 |
| hydroel.st. од. | 控制 |
| IMF. | 管制 |
| manag. | 管理、管制; 核对; 存根 |
| met. | 调整; 操纵; 控制装置 |
| pest.contr. | 防治 |
| |||
| 选择频率控制 | |||
|
selective frequency : 50 phrases in 10 subjects |
| Air defense | 3 |
| Aviation | 2 |
| Communications | 6 |
| Electronics | 12 |
| Geophysics | 1 |
| Information technology | 2 |
| Nautical | 2 |
| Space | 12 |
| Technology | 7 |
| Telecommunications | 3 |