The maintainability design for products depends on accumulative experience for a long time.
产品维修性的设计长期以来依赖于积累的经验。
In practical process, the crown is designed by trial and accumulative experience, leading to low efficiency, high cost and big error.
在实际工程中，靠人为摸索和经验积累来估计凸度，不仅效率低、成本高，而且误差大。
Traditional UPS Fault Diagnosis methods to diagnose and calculate the Diagnosis of equipments based on the accumulative experience and data.
传统的UPS旧障诊续的方式非依据己类积集的经验和数据，闭于拆备的旧障及其收铺变更入行诊续和估量。
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