In this paper, by using reliability design methods, the test pressure of ultrahigh cylinder is studied.
应用可靠性设计方法，对超高压圆筒耐压试验压力进行探讨，定量分析试验压力与影响因素之间的关系。
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。
Using the variable transformation method, the formulae of the axial symmetrical wall temperature distribution during steady heat conduction of a hollow cylinder are derived in this paper.
采用坐标变换法导出了圆筒空间轴对称问题稳态热传导温度分布的关系式。
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