介绍了利用波谱图判断机械故障的几种方法。
Some methods of judging mechanical fault using spectrogram are introduced.
分析了利用波谱图判断机械故障问题的几种方法。
Some methods on judging mechanical failure problem with spectrogram diagram were analysed.
脉络波谱图分析查明了中范围（频率）信号波动的形态结构变化。
Venation wave spectrum analysis finds out shape-structure change of mid-frequency signal fluctuation.
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