厚颜
发表于 2025-3-28 16:31:45
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灰心丧气
发表于 2025-3-28 20:18:57
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制定
发表于 2025-3-29 01:48:28
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卡死偷电
发表于 2025-3-29 04:12:39
Physical Exercise and Transplantation,s of 1.2 m parabolic reflector antenna with simultaneous transmission of S and X frequencies. This requires the feed to operate at optimum efficiency and generate concentric beam over the dual band. In this paper a dual band feed system which is simple to manufacture and having common phase center, concentric beam is discussed.
CRUC
发表于 2025-3-29 07:27:20
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恶心
发表于 2025-3-29 14:57:15
Natural Resource Management and Policyhttp://image.papertrans.cn/c/image/235346.jpg