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radio receiver
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射电天文接收机
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radio receiver
射电天文接收机
把射电望远镜馈源输出的电磁辐射场信号经过放大和加工,使它成为与天体辐射成正比且可测量的一种探测器。
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Beijing Zhenledao Media Co.,Ltd.
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Beilouqiu of Gaoshan nationality
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Beilu Bangzi Opera Inheritance Center of Datong City
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