How electric hydraulic jack works
The most basic principle on which hydraulic transmission is based is the Pascal principle, that is, the pressure across the liquid is uniform, so that in a balanced system, the pressure exerted on the smaller piston is smaller and the larger piston is applied. The pressure is also relatively large, which keeps the liquid stationary. Therefore, through the transfer of the liquid, different pressures at different ends can be obtained, so that a transformation can be achieved. The hydraulic electric jacks we often use are using this principle to achieve force transmission.