以下为句子列表：
英文: Applying classical wave theory, a concept of equivalent elastic modulus on propagation speed modification of guided wave through variable cross-sectionof metal bar embeded layer was put forward.
中文: 摘要运用波动的经典理论，提出了导波在金属杆嵌入层“变截面”传播时波速改变的“等效弹性模量”的概念。
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英文: Lastly, some new techniques of numerical analysis and signal processing for guided wave nondestructive testing are described.
中文: 论述了导波检测技术领域中数值分析方法和信号处理方面的一些新技术。
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英文: The recent advances in ultrasonic guided wave testing technique are summarized.
中文: 摘要综述近年来超声导波检测研究的最新进展。
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英文: The transmission mechanism of guided wave at joining-section of metal bars and embeded anchor was analyzed theoretically, and an idea of low-frequency impulse coupled whth guided wave propagating through joining-section was presented.
中文: 对导波在锚固金属杆中的传播，尤其是在金属杆与锚固交界面处的传播机理进行理论分析，并提出了在锚固交界面处导波以耦合“低频脉冲”传播的思想。
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英文: These conceptions might be used for interpreting time-lagof signal and leveled phenomena of waveform-signals that were produced on time-domain figures in application of guided wave to operate nondestructive test.
中文: 这一概念，可以解释运用导波进行无损检测得到的时域分析图中信号发生的“时滞”与波形拉平现象。
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