震源的起震装置，在爆炸震源的情况下，可能是一个爆炸机。
The source-initiation unit in the case of an explosive source is likely to be an electric blaster.
爆炸震源的地震纵波是脉冲性质的。周期振动是地震脉冲引起的次生振动。
A primary seismic wave from an explosive source is a pulse response, and its periodic vibration originates from seismic pulses.
结合地震反演方法和数值计算方法，研究了地下爆炸震源函数的特征以及介质特性对震源函数的影响。
The main characteristics of seismic source function in underground explosion are studied by seismological method and numerical method.
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