液壓技術是涉及液體流動和液體壓力規律的科學技術。近幾十年來.液壓技術發展非常快。廣泛應用于工業、農業和國防等各個部門。如機械制造業、起重設備、礦山機械、工程機械、農業機械以及化工機械;又如軍艦上的舵機、雷達掃描設備、坦克、火炮、飛機、導彈等都采用了液壓技術。特別是在機床行業中，由于采用液壓傳動可以實現無級變速、自動化和在往復運動中實現頻緊的換向等，所以它的應用正在不斷地擴大和完善。

Hydraulic technology is a scientific technology involving the law of liquid flow and pressure. In recent decades, hydraulic technology has developed very fast. Widely used in industry, agriculture and national defense and other departments. Such as machinery manufacturing, lifting equipment, mining machinery, construction machinery, agricultural machinery and chemical machinery; and such as warship steering gear, radar scanning equipment, tanks, artillery, aircraft, missiles and so on, all use hydraulic technology. Especially in the machine tool industry, because the use of hydraulic transmission can achieve stepless speed change, automation and frequency-tight commutation in reciprocating motion, so its application is constantly expanding and improving.