After the simulation of the well surrounded by two and three stratums, the two-dimensional spectrum is calculated while the curve of wave slowness changes with the frequency is drawn.
分别计算了井外有两层、三层介质时井内声波传播的二维谱，绘制了时差随频率的变化曲线。
After the simulation of the well surrounded by two and three stratums, the two-dimensional spectrum is calculated while the curve of wave slowness changes with the frequency is drawn.
分别计算了井外有两层、三层介质时井内声波传播的二维谱，绘制了时差随频率的变化曲线。
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