This paper introduces the process of repairing hydraulic cylinder by using boring and rolling combined working technology, working quantity is steady and production efficiency is high in this method.
介绍了用镗滚压复合加工技术修复液压缸筒的过程，此法修复缸筒质量稳定，生产效率高。
2
The influence of pollution removal efficiency and mechanism analyses if adjusting soil depth, the quantity of EM, hydraulic loading period.
土层厚度、EM投加量、水力负荷周期对污染物去除效果的影响及机理分析。
3
The ram pump service life's length, with the usual maintenance maintenance, hydraulic fluid quantity and the quality, the fat liquor cleanliness and so on concerns.