中文说明：
基于巴特沃思滤波器的50Hz工频险波器,程序给出了滤波器系数并且作了频谱分析。
English Description：
Based on Butterworth filter, the 50 Hz power frequency dangerous wave filter is designed. The filter coefficients are given and the frequency spectrum is analyzed.
50 Hz power frequency dangerous wave filter based on Butterworth filter
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中文说明：
基于巴特沃思滤波器的50Hz工频险波器,程序给出了滤波器系数并且作了频谱分析。
English Description：
Based on Butterworth filter, the 50 Hz power frequency dangerous wave filter is designed. The filter coefficients are given and the frequency spectrum is analyzed.
exa060603.m