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本文研究了超声频谱测厚方法在换热管壁厚测量中的应用，介绍了处理方法的基本原理以及硬件系统的构成，并对一些实验测厚结果进行了分析．
In this paper, the application of ultrasonic spectrum thickness measurement in the measurement of heat transfer tube wall thickness is studied. The basic principle of processing method and the hardware system are introduced. Some experimental results of thickness measurement are also analyzed.