When {TAIL ~ the first or second valve} of the extension side or compression side pressure control valve is opened, fluid is discharged from the guide bore into either of the two chambers in the cylinder through the communication passages and {HEAD ~ the first or second check valve} 
When { TAIL ~ the first or second valve } of the extension side or compression side pressure control valve is opened , fluid is discharged from the guide bore into either of the two chambers in the cylinder through the communication passages and { HEAD ~ the first or second check valve }
OTH 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 OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD