radio direction-finding
| database
| radio direction finding | |
| avia. | 无线电定向、测向 |
| navig. од. | 无线电测向 |
| space | 无线电定向 |
| radio direction-finding | |
| gen. | 无线电测向 |
| space | 无线电测向 |
| radio directions finding | |
| nautic. tech. | 无线电测向 |
| database | |
| gen. | 资料库; 基本数据; 数据库 |
| avia. | 数据 |
| chem. | 碱基库 |
| expl. | 数据库 |
| math. од. | 数据库 |
| proj.manag. | 信息库 |
|
radio direction-finding : 31 phrases in 6 subjects |
| Air defense | 2 |
| Aviation | 2 |
| Electronics | 4 |
| Navigation | 1 |
| Space | 7 |
| Technology | 15 |