继“变速覆盖层单界面折射波时距曲线的解释”讨论之后,我们继续讨论了第二层为变速层的潜射波时距曲线和底部为常速高速层的折射波时距曲线的解释方法。可用潜射波时距曲线的“始点”求第一层的厚度,然后用第二界面的折射波时距曲线的截距时间求第二层变速层的厚度。 Following the discussion of “Interpretation of time-distance curves of refracted waves at the single interface of a variable speed transmission cover”, we continue to discuss the time-lag curve of the sub-shot in the second layer and the interpretation of the time-course curve of the refraction of the high-velocity layer at the bottom. method. The thickness of the first layer may be obtained from the “starting point” of the latent time curve of the latent radio waves, and then the thickness of the second layer of the transmission layer may be calculated using the intercept time of the refracted wave time interval curve of the second interface.