[电] 定向天线

词型变化：名词复数形式 : directional antennas

directional antenna的用法和样例：

例句

A radio receiver and directional antenna used as a system to determine the angular direction of incoming radio signals.无线方向探测器一种无线电接收和指向天线系统，用来确定收到的无线电信号的角方向

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