The peak value varies in different fault conditions and it can be used as a characteristic for diagnosing leakage fault of exhaust valve, the fault in initial stages can also be diagnosed.
可以将三阶谱的峰值作为判断气阀是否漏气的一个诊断特征量，同时也为诊断内燃机气阀的早期漏气故障提供了依据。
Results the fingerprints was consisted of 50 color peaks in which there were 10 characteristic peaks, and the mean value of communal peak RSD was 0.81%.
结果所建立的挥发油指纹图谱，有色谱峰约50个，其中特征峰10个。共有峰的相对保留时间RSD的平均值为0.81%。
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