{HEAD ~ The system port} includes {TAIL ~ a valve stem} having a first end, a second end, and a bore integrated within 
{ HEAD ~ The system port } includes { TAIL ~ a valve stem } having a first end , a second end , and a bore integrated within
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH