绕射波（diffracted wave）是指地下任何小于或能与地震波波长相比拟的不均匀体，如断块、断棱均可看作是绕射点，当地震波通过绕射点时产生的波。
n. diffraction
misc. diffracted wave
五、绕射波(Defraction)时距曲线 绕射波(Defraction)时距曲线 (Defraction) 如左图所示，考虑地面上任意一点 S，绕射 点 D 的时距曲线方程为：
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非均质性含气地层其波场响应中绕射波比较发育。
Seismic response in heterogeneous gas-bearing strata would be characterized by relatively well developed diffracted wave.
但由于此两种方法的波散现象，存在绕射波收敛不完全等问题。
Merely the wave dispersion, the convergency of diffracted wave is, in most cases, incomplete.
本文讨论一项用以研究折射绕射波的三度空间超声波模拟实验的结果。
This paper deals with the results of a three-dimensional ultrasonic wave model experiment designed to study the mechanism of refractional diffracted waves.
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