{TAIL ~ The valve} 1, wherein said latching means define a held position of said counterholder in {HEAD ~ said housing} 
{ TAIL ~ The valve } 1 , wherein said latching means define a held position of said counterholder in { HEAD ~ said housing }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD