{HEAD ~ The burr} is {TAIL ~ re solidified material} inside the hole which can affect air flow through the hole 
{ HEAD ~ The burr } is { TAIL ~ re solidified material } inside the hole which can affect air flow through the hole
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