Applying a slight downward pressure on the squeegee support causes {HEAD ~ the rubber edge} to press against {TAIL ~ the flat surface} of the crystal wafer 
Applying a slight downward pressure on the squeegee support causes { HEAD ~ the rubber edge } to press against { TAIL ~ the flat surface } of the crystal wafer
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH