As a part of the project, this paper is mainly focused on the application study of ultrasonic life detector after disaster.
作为项目的一部分，本论文的侧重点主要是对超声波在灾害现场生命搜救中的应用进行研究。
As a part of the project, this paper is mainly focused on the application study of ultrasonic life detector after disaster.
作为项目的一部分，本论文的侧重点主要是对超声波在灾害现场生命搜救中的应用进行研究。
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