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