During an extension stroke of the piston rod, {HEAD ~ a damping force} is generated by {TAIL ~ an extension side valve body}, and at the same time, a valve opening pressure of an extension side main valve is adjusted by an inner pressure in an extension side backpressure chamber 
During an extension stroke of the piston rod , { HEAD ~ a damping force } is generated by { TAIL ~ an extension side valve body } , and at the same time , a valve opening pressure of an extension side main valve is adjusted by an inner pressure in an extension side backpressure chamber
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH