This sub assembly is preferably provided with {HEAD ~ funnel shaped apertures} to lead {TAIL ~ the electric leads} of a number of gun electrodes through the insulating plate 
to lead
This sub assembly is preferably provided with { HEAD ~ funnel shaped apertures } to lead { TAIL ~ the electric leads } of a number of gun electrodes through the insulating plate
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH