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Titlebook: Ultrasonic Testing of Materials; Josef Krautkr?mer,Herbert Krautkr?mer Book 19904th edition Springer-Verlag Berlin Heidelberg 1990 Materia

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發(fā)表于 2025-3-23 12:44:48 | 只看該作者
Book 19904th editionindustry, including recent applications such as those in nuclear power plants. This fourth edition features improved presentation of certain fundamental physical facts, updated reports on electronic instrumentation, and new applications in the nuclear and space industries.
12#
發(fā)表于 2025-3-23 17:03:42 | 只看該作者
ern heavy industry, including recent applications such as those in nuclear power plants. This fourth edition features improved presentation of certain fundamental physical facts, updated reports on electronic instrumentation, and new applications in the nuclear and space industries.978-3-662-10680-8
13#
發(fā)表于 2025-3-23 19:00:49 | 只看該作者
Ultrasonic Waves in Free Space of an elastic body can be visualised as shown in Fig. 1.2, but three-dimensionally. Provided such a body is not stressed by compression or tension beyond its elastic limit, it behaves like this spring model. In it, the particles can perform elastic oscillations. How then does a wave arise from an o
14#
發(fā)表于 2025-3-23 23:46:28 | 只看該作者
Josef Krautkr?mer,Herbert Krautkr?mert the reform has been a complex political process within which actors negotiated whether and to what extent healthcare remains a citizenship right or a commodity. This book will appeal to students and scholars of social policy, politics, health policy, public health and sociology.978-3-319-85211-9978-3-319-53667-5
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發(fā)表于 2025-3-24 03:56:03 | 只看該作者
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發(fā)表于 2025-3-24 07:52:25 | 只看該作者
Introductionspace knows no sound because it is the particles of matter themselves which vibrate, in contrast for instance to the oscillations of light or other electromagnetic waves where the electric and magnetic state of free space oscillates. In air a sound wave moves a discrete volume of air back and forth
17#
發(fā)表于 2025-3-24 14:41:12 | 只看該作者
Ultrasonic Waves in Free Spaceal wave is composed of oscillations of discrete particles of material. The motion carried out by a small mass attached to a spring as shown in Fig. 1.1 if pulled down once and released, is called an oscillation. Left to itself, the mass oscillates about the equilibrium position. The nature of this o
18#
發(fā)表于 2025-3-24 17:08:37 | 只看該作者
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