KHS Series are being used for the heavy industries. They, as all self-adjusting type, make a absorption of all impact gradually & smoothly because they are specially designed with multi-orifice structure. Piston rod of KHS Series returns again by dint of Return coil spring. KHG Series, as for the heavy industry & a self-adjusting type, absorb a gigantic impact energy comparing their small size by the dint of interaction between special oil and nitrogen gas. Compressed nitrogen gas makes the piston rod come out of the cylinder.