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