Velocity of Propagation(传播速度)： 一介质传输速度与光速的比值%。 延迟的意义 延迟(VR，Delay)是指固定频率下讯号波经过固定长度线材所需之时间。
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velocity of propagation of flame 火焰传播速度 ; 火焰传播速渡
velocity-of-propagation meter 传播速度计
apparent velocity of propagation 表观传播速度
Nominal Velocity of Propagation 额定传输速度
velocity of propagation meter 传播速度测量器
starting velocity of propagation 起裂速度
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Phenomenon of the change in velocity of propagation of monochromatic radiations in a medium as a function of the frequency of these radiations.
在介质中传播的单色光改变其传输速度的现象，并由该辐射的频率所决定的。
Meanwhile, the influences of pipeline internal pressure, wall thickness, crack arrest length and initial crack velocity on the crack driving force (crack propagation) are further studied.
进而分析了管道内压、壁厚、裂纹止裂长度和初始裂纹速度对裂纹驱动力(也即裂纹扩展)的影响。
The results show that it is essential to consider the factor of heat propagation velocity.
结果表明在某些场合，考虑热量传播速度这一因素是非常必要的。
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