In {TAIL ~ operation}, {HEAD ~ the laser beam} 30 from the laser 12 is directed by the mirror 14 to a focusing lens 16, which concentrates or focuses the laser beam 30 into the sintering nozzle 28 
In
In { TAIL ~ operation } , { HEAD ~ the laser beam } 30 from the laser 12 is directed by the mirror 14 to a focusing lens 16 , which concentrates or focuses the laser beam 30 into the sintering nozzle 28
REL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH