This material may exit through {TAIL ~ a lower opening} 28 defined by {HEAD ~ the lower rim} 22 
This material may exit through { TAIL ~ a lower opening } 28 defined by { HEAD ~ the lower rim } 22
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH