There is {HEAD ~ apparatus} for creating {TAIL ~ a beam} of a material being input thereto and for selectively including or not including respective ones of a plurality of materials within the beam 
There is { HEAD ~ apparatus } for creating { TAIL ~ a beam } of a material being input thereto and for selectively including or not including respective ones of a plurality of materials within the beam
OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH