Scissor jack are mechanism defined by a connected series of levels, with screw bar to adjust the height. The purpose of most scissor jack is to raise and lower things.
In principle, the hydraulic jack is based on Pascal principle, that is, the pressure of the liquid is the same everywhere, so in a balanced system, the pressure exerted on the smaller piston is relatively small, and the pressure exerted on the larger piston is also relatively large, which can keep t