frequency code
| type
CTC
| frequency code abbr. | |
| tech. | 频率码; 频率电码 |
| type abbr. | |
| gen. | 类; 打字 |
| gen. од. | 型 |
| dat.proc. | 键入 |
| hydroel.st. | 类型; 种类; 式样 |
| manag. | 样板; 样式 |
| math. | 类型，序型 |
| |||
| 频率码; 频率电码 | |||
|
frequency code : 44 phrases in 11 subjects |
| Air defense | 1 |
| Artificial intelligence | 1 |
| Automobiles | 4 |
| Aviation | 3 |
| Communications | 2 |
| Electronics | 13 |
| Geophysics | 1 |
| Information technology | 2 |
| Space | 5 |
| Technology | 5 |
| Telecommunications | 7 |