研究开发了用超声法探测结构物水下裂缝的方法。
Untrasonic pulse method was developed to explore the cracks of structures under water.
首先利用超声波探测法对节理裂隙岩体进行了声波测试，对不同的节理裂隙岩体进行了质量评估。
Utilizing the technique of ultrasonic detection on jointed and fractured rock masses, the author firstly measures the elastic wave velocity, then appraises the quality of different masses.
根据超声波探测理论，讨论了多脉冲循环法用作非接触式流量检测的原理。
According to the theory of ultrasonic inspection, the principle of flow inspection using multi pulse circulation method was discussed.
首先利用超声波探测法对节理裂隙岩体进行了声波测试，对不同的节理裂隙岩体进行了质量评估。
The stability of unsupported tunnels in jointed rock masses at different depths is analyzed using the distinct element method.
首先利用超声波探测法对节理裂隙岩体进行了声波测试，对不同的节理裂隙岩体进行了质量评估。
The stability of unsupported tunnels in jointed rock masses at different depths is analyzed using the distinct element method.
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