{HEAD ~ The invention} relates generally to valves, and, more particularly, to {TAIL ~ an automatic fluid switching valve} 
relates to
{ HEAD ~ The invention } relates generally to valves , and , more particularly , to { TAIL ~ an automatic fluid switching valve }
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL