由干液压介质在回路内部流动时不显示视觉形象和声响特征,常给查找故障带来困难。在实践中曾参考黑箱理论试以类比法从电工和无线电修理中转借一些指导原则,结果减少了搜索工作量,并可归纳成若干规律。 By the dry hydraulic medium flow inside the circuit does not show the visual image and sound characteristics, often to find fault problems. In practice, referring to the black box theory, analogy has been used to transfer some guiding principles from electrician and radio repair. As a result, the search workload has been reduced and can be summarized into a number of rules.