What is the working principle of adjustable pressure pneumatic rod?

Principle: The closed pressure cylinder is filled with inert gas or oil-gas mixture, so that the pressure in the cavity is several times or dozens times higher than atmospheric pressure, and the movement of the piston rod is realized by using the pressure difference caused by the cross-sectional area of the piston rod being smaller than that of the piston.

Pneumatic rod: Pneumatic rod is an industrial accessory that can support, buffer, brake and adjust height and angle. It consists of the following parts: pressure cylinder, piston rod, piston, sealing guide sleeve, filler (inert gas or oil-gas mixture), control elements inside and outside the cylinder (referring to controllable gas spring) and joints.