said {HEAD ~ metering valve cavity} having {TAIL ~ an end wall} through which said interconnecting passage leads and having a smooth axial bore leading from said end wall, 
having
said { HEAD ~ metering valve cavity } having { TAIL ~ an end wall } through which said interconnecting passage leads and having a smooth axial bore leading from said end wall ,
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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