Compare filter before and after speech signal waveform and spectrum.
比较滤波前后语音信号的波形及频谱。
Compare the decline in blood flow velocities and its recovery time before and after Trousseau's test in vertebral waveform with or without notch at systole.
通过对椎动脉收缩期切迹组与无切迹组做束臂试验，比较束臂前后收缩期血流速度下降幅度及流速自下降至恢复的时间。
Compare the decline in blood flow velocities and its recovery time before and after Trousseau's test in vertebral waveform with or without notch at systole.
通过对椎动脉收缩期切迹组与无切迹组做束臂试验，比较束臂前后收缩期血流速度下降幅度及流速自下降至恢复的时间。
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