{TAIL ~ A second fluid} 16160 may be disposed in {HEAD ~ internal chamber} 16150 preferably comprises an at least partially compressible fluid  
{ TAIL ~ A second fluid } 16160 may be disposed in { HEAD ~ internal chamber } 16150 preferably comprises an at least partially compressible fluid
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH