求翻译：本文利用烘箱和电加热套两种热加载方式对PBX炸药进行了热损伤实验，并通过超声波测试获取声速等特征参数对炸药损伤程度进行定量表征，分析了炸药的热损伤机理是什么意思？

In this paper, oven and set of two thermal electric heating method of PBX explosives loaded thermal damage experiments and to obtain the speed of sound through the ultrasonic testing of explosives and other characteristic parameters for quantitative characterization of the degree of injury, analysis

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This article uses both oven and electric heating heat load on PBX explosive experiments of thermal damage, and ultrasonic test to obtain the speed of sound, and other characteristic parameters on explosive injury to quantitative characterization, analysis of thermal damage mechanism of explosive

In this paper, oven and set of two thermal electric heating method of PBX explosives loaded thermal damage experiments and to obtain the speed of sound through the ultrasonic testing of explosives and other characteristic parameters for quantitative characterization of the degree of injury, analysis