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