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