| 1. | These include the well - known am , fm , shortwave and citizens bands and vhf and uhf television channels , as well as hundreds of less familiar bands that serve cellular and cordless telephones , gps trackers , air traffic control radars , security alarms , radio - controlled toys and the like [ see box on page 71 ]
这些频率包括众所周知的am 、 fm 、短波、民用频带， vhf和uhf电视频道，以及数百个较不为人知的频带，供行动电话、家用无线电话、 gps追踪系统、航空管制雷达、安全警示与无线电遥控玩具等使用（见85页无线电频谱） 。 |
