... 派生系统育种法 derived line method 定向无线系统 beam aerial 定向寻找系统 direction finding system ...
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rotary beam aerial 射束旋转天线
marconi beam aerial 马可尼定向天线
beam aerial system [电讯] 定向天线系统
beam aerial feeder 定向天线馈电线
beam reflector aerial system [电讯] 定向反射天线系统
beam reflector receiving aerial 定向反射接收天线
Beam Primary Aerial System 无反射器定向天线系统
beam receiving aerial system 定向接收天线系统
aerial beam width 天线波束宽度
N an aerial system, such as a Yagi aerial, having directional properties 定向天线 (Also called (esp US) beam antenna)
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