1、液压是机械行业、机电行业的一个名词。液压可以用动力传动方式，成为液压传动。液压也可用作控制方式，称为液压控制。
2、液压原理在一定的机械、电子系统内，依靠液体介质的静压力，完成能量的积压、传递、放大，实现机械功能的轻巧化、科学化、最大化。
3、在液压系统中，由于某种原因引起液体压力在某一瞬间突然急剧上升，而形成很高的压力峰值，这种现象称为液压冲击。
4、根据工作环境和工况条件选择液压油的品种在选用液压设备所使用的液压油时，应从工作压力、温度、工作环境、液压系统及元件结构和材质、经济性等几个方面综合考虑和判断
Hydraulic pressure is a noun of mechanical industry and Electromechanical Industry. The hydraulic pressure may use the power transmission way, becomes the hydraulic pressure transmission. Hydraulic pressure can also be used as a control mode, known as hydraulic control. 2, the hydraulic principle in a certain mechanical, electronic system, depending on the liquid medium static pressure, complete energy accumulation, transfer, amplification, to achieve the mechanical function of light, scientific, maximum. 3. In the hydraulic system, due to some reason, the liquid pressure suddenly and sharply rises in an instant, and forms the very high pressure peak value, this phenomenon is called the hydraulic shock. 4, according to the Working Environment and conditions of the selection of hydraulic oil varieties of hydraulic equipment used in the selection of hydraulic oil, the work pressure, temperature, working environment, hydraulic system and component structure, material and economy should be considered and judged
