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