The measurement and inspection methods based on ultrasonic technology usually request accurate measuring the propagation time of ultrasonic wave in media.
基于超声波技术的检测方法，通常需要精确地测量超声波在介质中的传播时间。
The measurement and inspection methods based on ultrasonic technology usually request accurate measuring the propagation time of ultrasonic wave in media.
基于超声波技术的检测方法，通常需要精确地测量超声波在介质中的传播时间。
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