For this, {HEAD ~ electron radiation} of {TAIL ~ 3 megavolts} is aimed at the surface of the bellows simultaneously from three different sides for more uniform exposure 
of
For this , { HEAD ~ electron radiation } of { TAIL ~ 3 megavolts } is aimed at the surface of the bellows simultaneously from three different sides for more uniform exposure
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH