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radio receiver
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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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Ancient Society
Ancient Sogdian Letters
ancient sports in foreign countries
Ancient Subsistence Study
ancient.sunspot observation
ancient systematic scientific thought
Ancient Tea Garden at Yushan
ancient tea set
ancient thread stitching
ancient timers
Ancient Tombs at Baling Hill
Ancient Tombs at Leigudun
Ancient Tombs at Liudingshan
Ancient Tombs at Longtoushan
Ancient Towpath
ancient tree group in Eryuan County
ancient trees in Beijing center
Ancient Trees in Mount Tianmu
ancient trees in the Ming Tombs, Changping
ancient trees in the Tanzhe Temple
ancient trees in the Temple of Heaven Park
ancient trees in Xiangshan Park
Ancient Villages in Southern Anhui–Xidi and Hongcun World Culture Heritage
ancient water conservancy projects in the Mesopotamia
ancient water conservancy projects in the Nile valley
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更新时间:2026/9/4 9:56:10