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指出齿轮箱故障的五种基本特征信号，阐述了这些信号特征与典型故障之间的内在联系，为起重运输机械齿轮箱故障特征的提取与识别奠定了基础。
The five basic characteristic signals of gearbox fault are pointed out, the intrinsic relationship between these signal characteristics and typical fault is expounded, which lays the foundation for the extraction and identification of the fault characteristics of the mechanical gearboxes.