马具
发表于 2025-3-28 16:40:45
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Presbycusis
发表于 2025-3-28 20:50:29
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CRUE
发表于 2025-3-29 00:10:34
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Armada
发表于 2025-3-29 05:01:50
The Prediction of Weather Effects on Telecommunications Link Performance,iption of weather effects. The measured effects of weather, namely atmospheric attenuation and increase in ground receiver system noise temperature, are additive (in decibels). The combined probability density function is therefore the convolution of the separate density functions.
陈腐思想
发表于 2025-3-29 09:29:40
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心神不宁
发表于 2025-3-29 11:36:39
Radio Frequency Selection and Interference Prevention,freedom from interference. Radio frequencies for deep-space research may be chosen from bands that are allocated for that purpose. The choice of particular frequencies within those bands is guided mostly by the need to avoid interference between deep-space missions. Interference may also result from
无聊点好
发表于 2025-3-29 16:28:06
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Notify
发表于 2025-3-29 22:27:22
Book 1983r of 1977. This improvement was attained through ingenious design based on the sort of penetrating analysis set forth in this book by engineers who took part in a highly detailed and amazingly successful pro gram. Careful observation and analysis have told us much about limitations on the accurate
Minuet
发表于 2025-3-30 01:20:10
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使声音降低
发表于 2025-3-30 05:56:49
Roy Billinton,Ronald N. Allangen. Die republikanische Schule, einst einer der Grundpfeiler der Nation und der Demokratie, hat sich zur demokratischen Massenschule gewandelt. Das Krankenhaus, das im Geiste von Wissenschaft und Barmherzigkeit geführt wurde, entwickelte sich zu einem Unternehmen für medizinische Behandlung. Die So