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本文主要介绍用超声波透射法探测表层土下近距离异物的试验。文中给出了土壤和各异物的部分声学参量，并给出了土体模型中埋设与未埋设异物时波形的对比。
In this paper, we mainly introduce the ultrasonic transmission method to detect the close-range foreign matter in the surface soil. In the paper, some acoustic parameters of soil and various foreign bodies are given, and the comparison of the waveforms of buried and undressed foreign bodies in soil model is given.