The principle and method of measuring the acoustic speed CVD diamond film with piezoelectric film detecting laser ultrasonic system are presented.
本文介绍了压电薄膜检测的激光超声系统对CVD金刚石膜声速测量的原理及方法。
In our country, we mainly use ultrasonic detecting method, the mainly equipments are the big detector train and the rail detector.
我国钢轨的探伤主要采用超声波检测方法，设备主要有大型探伤车和小型探伤仪。
A practical and effective ultrasonic inspection method for detecting internal flaw of brake disc is put forward and the key procedure is to select a proper probe.
提出运用超声检测的方法检测制动盘内部缺陷是切实可行的，而选择合适探头是超声检测成功的关键。
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