名词
中文翻译：双天线
同义词：
['dual antenna', 'dual-bandantenna']
例句：
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1. Thedoublet antenna is used to transmit andreceive signals in both directions.
双天线用于双向传输和接收信号。
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2. The engineerinstalled the doublet antennaon the roof of the building.
工程师在大楼的屋顶上安装了双天线。
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3. The doublet antenna was designed toimprove signal strength and coverage in urban areas.
双天线被设计用来提高城市地区的信号强度和覆盖范围。