超声波频率 Ultrasonic Frequency ; berschallwellenfrequenz ; Ultraschallwellenfrequenz
超声波频闪观测器 ultrasonic stroboscope
超声波频散 ultrasonic dispersion
超声波频闪观察器 [仪] ultrasonic stroboscope
超声波超声频 supersonic
德拜席耳超频声波管 Debye-sears Ultrasonic Cell
超声波功率与频率 Ultrasonic power and frequency
超[频]声波干涉计 interferometer ; ultrasonic
低频超声波 Low frequency ultrasonic wave ; Low-frequency ultrasound
并评价用高频超声波 HF US ; high-frequencyultrasound
国外在这方面有较系统的研究，并提出了一种预测零频到超声波频率之间全部速度频散的分析技术。
It has been researched systematically on abroad, and an analysis technology was put forward to predict all the velocity's dispersive of frequency from zero to ultrasonic frequency.
小管径频差法超声波流量计的测量精度受各种因素的影响，因而获得较高精度比较困难。
The precision of the ultrasonic flowmeter with small tube diameter and frequency difference method is affected by several factors, so to gain more accuracy is difficult.
笔者采用数字手段去测取超声波信号的频差，通过频差法可得出流体的平均速度，进而获得高含沙量流体的流量。
A digital signal processing way is established to obtain ultrasonic signal frequency shift in the test of high sand content fluid flow.
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