单挑
发表于 2025-3-30 09:20:16
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BET
发表于 2025-3-30 14:16:48
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hemoglobin
发表于 2025-3-30 18:41:31
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蛰伏
发表于 2025-3-30 21:34:35
Book 1991tion, it is based on lectures on ultrasound which the author has given over the past fifteen years to students of electrical engineer ing and physics at the Rheinisch-Westfiilische Technische Hochschule Aachen, Germany. Its purpose is to explain and describe the peculiarities of high frequency soun
Champion
发表于 2025-3-31 03:37:01
Generation and Detection of Sound with Frequencies Above 1 GHz (Hypersound), give access to fundamentally different methods of sound generation and detection. These methods are referred to as ‘incoherent methods’ which means that the sound produced is incoherent. The choice of name may be understood by comparing optical and acoustical sources of radiation.
reperfusion
发表于 2025-3-31 06:03:07
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Malcontent
发表于 2025-3-31 11:09:10
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