您要查找的是不是：
- Low Frequency Omni Directional Radio Range 低频全向无线电信标
- directional radio range 无线电指向标
- We directed radio waves around the globe. 我们向全球发射无线电波。
- Turns are wide and easy going -- no issues there. Radio range is decent enough for use in a small park. 明显的,开关遥控对于能在小公园放飞的迷你飞机是合适的。
- A directional radio and television antenna consisting of a horizontal conductor with several insulated dipoles parallel to and in the plane of the conductor. 八木天线一种定向的收音机或电视的天线，由与水平的避雷针平行的几个绝缘振子和绝缘平面组成
- A cellular telephone system provides a wireless connection to the PSTN for any user location within the radio range of the system. 一个蜂窝电话系统可以为在该系统无线电收发范围内的任何用户提供一个到PSTN的无线电话连接。
- They had no direct radio link with aircraft but used telephones to stay in touch with airline dispatchers, airway radio operators, and airport traffic controllers. 他们不与飞机建立直接的无线电联络，而是同航空公司签派员、航路电台工作人员和机场管制员保持联系。
- CEER divides a target area into sub-areas called grids such that all sensor nodes in a grid are within the radio range, and a cluster head is selected in each grid. CEER把整个目标区域分割成许多个子区域(网格)，使得每个在网格内的感测节点彼此都能在无线电范围内，然后每个网格都会选出一个丛集头。
- A method of radio ranging based on insert service of AOS is presented. 摘要提出了一种基于高级在轨系统中插入业务的无线电测距方法；
- Ground-based radio-navigation systems use relatively low frequencies of the radio spectrum to achieve a large radio range and avoid undefined skywave (ionospheric) propagation at the same time. 陆基无线电导航系统使用相对低的频段的无线电波以获得较大的接收范围和避免空间传播方式（电离层反射）。
- Non Directional Radio Homing Beacon 无方向性无线电归航信标
- revolving directional radio beacon 旋转定向无线电导向台
- Directional Radio Beacon Station 定向无线电信标台
- When Clementine directed radio waves at permanently shadowed regions near the moon's south pole, the reflected signals were characteristic of an icy surface. 当克莱门蒂号在月球南极附近的终年阴影区侦测到无线电波，反射的讯号具有冰覆表面的特徵。
- High frequency omnidirectional radio range 高频全向无线电导航
- Very High Frequency Omnidirectional Radio Range 甚高频全向无线电信标
- Doppler VHF Omnidirectional Radio Range 多普勒甚高频全向无线电信标
- precise VHF omnidirectional radio range 精密甚高频全向无线电信标
- She cast her eyes down to avoid direct eye contact. 她垂下双目以避免对视。
- phase-shift omnidirectional radio range 相移全向无线电指向标
