业余无线电台操作证书考试题库A类

Lk0408 业余无线电通信中常用的天线种类的缩写beam代表 定向天线

The abbreviation BEAM for antenna types commonly used in amateur radio communication represents a directional antenna.

业余无线电通信中常用的天线种类的缩写BEAM代表定向天线。

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