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