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