A line drawn by a recording instrument, such as a cardiograph.
她在纸上画的铅
线上加描墨水。
音，声波;
;
;声的;,变频;
像;A line drawn by a recording instrument, such as a cardiograph.
她在纸上画的铅线上加描墨水。
Methods Ultrasonic Dopple cardiograph was used to detect some indice reflecting the function of left ventricle.
方法利用多普勒
声心动图,选择反映左心室功能的部分指标进行无创性检测。
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