中文说明：
对机械振动信号用三维能量谱进行分析。
English Description：
The mechanical vibration signal is analyzed by three-dimensional energy spectrum
The mechanical vibration signal is analyzed by three-dimensional energy spectrum
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中文说明：
对机械振动信号用三维能量谱进行分析。
English Description：
The mechanical vibration signal is analyzed by three-dimensional energy spectrum