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众所周知，液压支架突出的缺点就是出现故障时不易快速查找原因，故障的某些征兆有相当的复杂性和隐蔽性，故障与征兆之间的关系往往是模糊的，难以依靠传统的感官和经验进行诊断。这种模糊性一方面来自故障与征兆之间关系的不确定性；另一方面又来自故障与征兆在概念描述上的?
It is well-known that the prominent disadvantage of hydraulic supports is that it is not easy to find out the cause of faults quickly. Some of the faults have considerable complexity and concealment. The relationship between faults and symptoms is often vague and difficult to rely on traditional senses and experiences diagnosis. This ambiguity, on the one hand, comes from the uncertainty of the relationship between failure and symptom; on the other hand, from the concept of failure and symptom?