For example, {HEAD ~ the optical surface} of {TAIL ~ a mold} half can be corona treated to modify the surface properties 
of
For example , { HEAD ~ the optical surface } of { TAIL ~ a mold } half can be corona treated to modify the surface properties
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH