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1·The used ultrasonic testing method is only limited to A-scope pulse-echo method.

所用的超声探伤方法仅限于八型显示脉冲反射法。

2·This paper introduces two methods of ultrasonic characterization of thin layers: pulse-echo and Lamb waves.

本文介绍了两种目前常用的材料薄层超声表征方法——纵波脉冲回波法和兰姆波法。

3·This paper introduces two methods of ultrasonic characterization of thin layers: longitudinal pulse-echo and Lamb waves.

介绍了两种常用的材料薄层超声表征方法———纵波脉冲回波法和兰姆波法。

4·It is effective and practical to use ultrasonic pulse-echo method for insulation condition diagnosis of generator stator bars.

超声反射法是一种有效的、实用的大电机主绝缘状态诊断方法。

5·The speed of moving-target was measured based on the principle of PD frequency shift, and the range of moving-target on the pulse-echo principle.

利用多普勒频移原理实现了运动目标速度测量，利用脉冲回波测距原理实现运动目标距离测量。

6·Explain the characteristics of piezoelectric crystals and the factors relating to the resonant frequencies of a piezoelectric crystal, and the procedure of the pulse-echo method.

说明压电晶体的特性和与压电晶体的共振频率有关的因数，以及脉波-波法的过程。

7·The popular non destructive test methods for the foam-cored sandwich structure are reviewed; including air coupled ultrasonic method, pulse-echo ultrasonic method and shearogragh method.

回顾了泡沫夹层结构常用的无损检测方法：空气耦合超声方法、脉冲回波超声方法以及激光错位散斑干涉方法。

8·This paper presents the development of a pulse-echo measurement method, based on the use of a phase spectrum to determine the ultrasonic wave velocity. A detailed descripsion of the theory is given.

本文报道了一种基于脉冲回波相位谱的超声波速度测量方法，并给出了它的详细理论推导过程。

9·The characteristics of this echo pulse tell us about the superposition we have made. Credit: ucl.

这种“回波”脉冲的特性可以告诉我们系统处于何种叠加态上。

10·Steering exposure time of a camera through control electron shutter with laser echo pulse is an effective method for inhibiting background noise.

用激光回波脉冲控制电子快门来操纵摄像机的曝光时间，是抑制背景噪声的一种有效方法。