The valve further comprises orifice means to permit {HEAD ~ metered flow} between {TAIL ~ the chambers} 
between
The valve further comprises orifice means to permit { HEAD ~ metered flow } between { TAIL ~ the chambers }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL