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