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1.The police used a pillbox antenna to monitor the suspect's movements.
警方使用一个炮台天线来监控嫌疑人的行动。
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2.The military had a pillbox antenna on their base for surveillance purposes.
军方在他们基地上安装了炮台天线，用于监视目的。
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3.The pilot was able to use his pillbox antenna to track the enemy aircraft.
飞行员能够使用他的炮台天线追踪敌机。