The structure of hydraulic system for simulating lifting apparatus was proposed and calculating method was defined.

给出了液压提升机模拟实验系统结构及能量回收效率的计算方法。

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Hydraulic lifting upside-down method is advanced for the internal steel stacks' installation, and it was firstly invented inland.

液压提升倒装法是一种先进的多管式烟囱钢内筒安装方法，属国内首创。

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The method of lifting the precision of axial spare parts by using hydraulic auto top end is introduced. It has made good result.

介绍了采用液压式自动顶尖，提高轴类零件加工精度的方法，并收到了良好效果。

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