In {HEAD ~ addition}, a plurality of check valves 66 extend through the flange 30 beneath {TAIL ~ the tubular member} 18 
In { HEAD ~ addition } , a plurality of check valves 66 extend through the flange 30 beneath { TAIL ~ the tubular member } 18
OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH