A simple structure is realized by using {HEAD ~ a common guide bore} for guiding the extension side valve body and {TAIL ~ the compression side valve body} 
for guiding
A simple structure is realized by using { HEAD ~ a common guide bore } for guiding the extension side valve body and { TAIL ~ the compression side valve body }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL