The pressing operation shapes the main portion of the glass and offsets {HEAD ~ the reform area} from {TAIL ~ the general surface curvature} of the main glass portion 
from
The pressing operation shapes the main portion of the glass and offsets { HEAD ~ the reform area } from { TAIL ~ the general surface curvature } of the main glass portion
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH