doppler ultrasonic blood flow signal
doppler ultrasonic blood flow signal
多普勒超声血流信号
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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As Doppler shift signal can significantly reflect the speed of flow, the abstracting of Doppler shift signal is the key of blood flow speed testing in a ultrasonic blood flow detector.
超声血流仪实现其测量血流速度的关键是多普勒频移信号的提取，多普勒频移信号是血流速度的真实反映。
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