headlong 发表于 2025-3-26 22:22:11
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https://doi.org/10.1007/3-540-33870-5orous leaves or walls are typically inserted into airborne transmission paths to achieve isolation, and isolation of structure-borne sound is accomplished by inserting elastic elements (springs) or layers (resilient materials, air gaps). Sometimes heavy . are also used. In every case, the goal is topellagra 发表于 2025-3-27 07:17:21
Magnetic-Field Transducers,s of labour as not-capital/value are shown to have formidable ramifications concerning the crisis-ridden nature of capitalist social relations and the struggles operative within and against them..978-3-031-58416-9978-3-031-58414-5新义 发表于 2025-3-27 12:04:34
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https://doi.org/10.1007/b137983red where the diameter varies with .. In other words, the area function . = .(.) is no longer constant. Nevertheless, the condition . ≪ . shall still holds. Two cases – depicted in Fig.8.1 – will be discussed.ERUPT 发表于 2025-3-27 21:11:32
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Werner Hauger,Horst Lippmann,Ewald Werner those in the field of communication technology, to a special interest in acoustics. A further reason for the affinity of engineers and physicists to acoustics is based on the fact that many physical and mathematical foundations of acoustics are usually well known to them, such as mechanics, electrodynamics, vibration, waves, and fields.去才蔑视 发表于 2025-3-28 09:41:29
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Aufgaben zu Technische Mechanik 1–3 that can be derived by imagining a small . of the border area. We have.for the magnetic field, and.for the electric field, having recalled from electrodynamics that the energy, ., stored in an inductance is ., and the energy stored in a capacitance is ..