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| direction finder (一种装有能确定无线电发射机方向的方向感测天线的无线电接收机。专用的无线电测向仪用在飞机上作为机载导航设备。其他的测向仪是指在固定地面上的，主要用来为要求航向帮助的飞机定位或降落飞机的定位。特高频测向仪 (UDF)接收特高频段电波，甚高频测向仪 (VDF)接收甚高频段电波,特高频/甚高频测向仪 (UVDF )则两个波段的电波都接收) | |||
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定向器、测向器 : 23 phrases in 11 subjects |
| Air defense | 1 |
| Aviation | 3 |
| Desert science | 1 |
| Earth sciences | 1 |
| Electronics | 1 |
| General | 1 |
| Oil / petroleum | 1 |
| Space | 2 |
| Technology | 10 |
| United States | 1 |
| Wind Energy | 1 |
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