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在汤姆逊公司研制的一个新型系统原型机进行了十分精密的试验之后,瑞典民航局就订购了5部这种二次雷达的应答器样机,以便将这些应答器组装到已经安装好的国外生产的雷达上。
After a very sophisticated test of a new prototype system developed by Thomson, the Swedish Civil Aviation Authority ordered five transponder prototypes of such secondary radars to assemble the transponders into an already installed foreign production On the radar.