1. VDF? Very – high – frequency Direction Finder? 甚高频测向器?。
2. I am calibrating radio direction finder or adjusting compasses. 我正在校准无线电测向仪或校正指南针。
3. Function test and calibration self-heterodyne curve for direction finder on sea trial. 航行试验中测向仪效用试验及自差曲线校正。
4. This article discourse upon the principle and system construction of Interferometer Direction Finder. 论文介绍了多波道干涉仪测向的系统构成及其原理。
5. In this paper, a Radio Direction Finder system is designed on the basis of the principle of Doppler Diretion Finder technology. 本文在对多普勒无线电测向技术深入研究的基础上设计实现了一套无线电自寻的系统。