<p>The cylinder has movably guided pistons (4) surrounding a cylinder part (2). A cylinder inner space is divided into two cylinder chambers (6, 8). A piston rod (12) is arranged at one of the cylinder chambers and extended from the cylinder part. The other cylinder chamber is acted by compressed gas. The former cylinder chamber is sealed against outside environment of the cylinder part in a pressure tight manner. Two cylinder chambers are flow-connected with each other. The pistons comprise a through-hole.</p>
