Accordingly, the present invention has as one feature the use of a powder filler of varying particle size which minimizes {HEAD ~ porosity} by {TAIL ~ ability} to produce a denser packing 
by
Accordingly , the present invention has as one feature the use of a powder filler of varying particle size which minimizes { HEAD ~ porosity } by { TAIL ~ ability } to produce a denser packing
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH