DC motor speed control system simulation, modeling, system simulation, simulation curve drawn
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simulation curve drawn
绘制仿真曲线
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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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