{HEAD ~ A fluid flow controlling device} having {TAIL ~ a working member} capable of reciprocating in a tubular case 
having
{ HEAD ~ A fluid flow controlling device } having { TAIL ~ a working member } capable of reciprocating in a tubular case
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH